First, go back an reread your original response to me, the one in which you started by saying obviously I was saying that they faked test results. Then climb down off your high horse, because frankly you have zero claim to moral superiority here. You started slinging mud from the get go, hardly fair to whine about the fact that your now getting dirty as a result.
It's funny that you mention that post... because you still haven't addressed the absolute first point I made, have you?
dpreviews has photos taken with both cameras. The noise at higher supported ISO is clearly less with the T3 than the 3100/3200. You've not explained how this is possible along with your claim that noise is worse on the T3. Instead: you've called me a zealot.
I think I'll keep my high-horse as the victim here. I didn't name call first.
Second, if you want to compare lowlight capabilities from Nikon to Canon it sure helps a lot if you stick to the very lowest stuff available in Nikon's lineup. Cherry picking results can help a lot. Unfortunately in this case it doesn't help nearly enough, again there are noticeable differences between them even on the links you provided. Whether or not you chose to see them that's up to you, but that's why I prefer objective data comparison of the sensor output because there is nothing subjective about such testing, it's entirely objective. But hey, to each his own I guess.
I am sticking to the cameras being asked about. (my erronious cite to T3i rather than T3 not withstanding).
I'm not comparing Canon to Nikon. I'm comparing the T3 to the D3100/D3200 as these are the specific cameras asked about by the OP.
The fact that you have turned a comparison if specific cameras into a brand-war in your head really does say a lot about who it the zealot (a word you first slung, if you recall)
As for the rest, well again I see little to no point in continuing a "discussion" with you on this topic, you've obviously made up your mind despite all evidence to the contrary which makes any form of meaningful dialogue impossible. So again I will wish you well and hope you enjoy your day.
The evidence you've never presented?
Again: the actual high-ISO shots on DPReview clearly show less noise on the T3 than the D3100/D3200 at high ISO. Please point me at the evidence to the contrary. You've never addressed literally the first question I asked you.
Actually it was addressed, but if you'd like a more complete and total debunking of this nonsense, ok - sure. It's not like it will really matter, as you will only see what you wish to see. Even on the objective sensor tests the difference between a D3100 and a T3 when it comes to high iso/low noise is only about 0.3 Fstops, so not a huge difference between the two really. So when we examine your incredibly subjective testing methodology used over at DPReview, we really shouldn't see a huge difference between the two images as far as noise. I wouldn't expect there to be - nor would anyone with an ounce of objectivity.
When you get to the D3200 the difference is a little more pronounced, which of course is also to be expected since your looking at closer to a 0.6 Fstop difference in the two. Once you get to the D5200 your looking at roughly about a 0.8 Fstop difference and that really starts to become pretty significant. It becomes even more pronounced when you consider the greater dynamic range of the Nikon sensors and take images of something that have some actual color variation to them, but no point in beating this already incredibly dead horse to point of ridiculousness.
Even using the website you linked I think most objective observers who examine the samples closely and with an open mind will see the same differences I did, even though the website chose a terrible sample image to use for their testing because it has very little in the way of color variation. But if you look at the three solid color samples closely and realize that most colors are made up of some combination of these primary's, you'll begin to see that there are some noticeable differences between the two cameras, even between the D3100 and the T3. So if you were taking actual "real world" pictures rather than simply product shots of your coin collection on a plain background yes you would see the differences and they would be more pronounced. But even just examining the solid color samples, it's there. If you'll let yourself see it.
So, in summation, as for the OP or anyone else who is choosing between Nikon or Canon, both have their individual strengths and weaknesses. Lowlight capability and low noise at High ISO is definately not a strength of Canon's crop sensor line up, and anyone that claims otherwise, well I'm sorry but it simply isn't even remotely close to being true. To make matters worse, really the only camera in Canon's crop sensor line up that shows even marginal improvement over their entry level offerings is the 70d, so if you want even a marginal improvement in this arena over the entry level model you'd better be prepared to drop 1k on a camera body. That's really the big kicker here - in Nikon if you are unhappy with the high noise/low ISO performance of the 3100, you can get better in this category by getting a D3200, D5200, D7100 - a lot of choices really that can make a significant difference in this category. If you have a T3, well you aren't going to see any difference unless you step all the way up to the 70d, and even then your looking at a whole 0.3 fstop improvement, basically the same as the difference between the D3100 and the T3.
Now if you don' t shoot in lowlight much, or use studio lighting or flash a lot, or don't really need the higher iso to low noise abilities then this really isn't as much of an issue for you. As such some of the other features that Canon offers might be something that really fit your style of shooting - such as better/larger buffers for continous shooting, or in many models better video capabilities, etc. As such, hey, if you buy a Canon for those reasons I certainlly wouldn't blame you. Nor would I ever behave like a 2 year old on a serious tear and assualt someone with all manner of hyperbole just to make myself feel better about buying a Nikon. Honestly I never have really understood why people do that, it baffles me.