The simple fact is, that even at base ISO levels, Canon's current sensors suffer from patterned noise problems...this is why Nikon is kicking Canon's ass. There's a small but dedicated group of Canon fans who try their best to argue against simple science, and who continually try to cast doubt on DxO Mark's results. Over and over and over, these guys spend time and effort trying to call into question/discredit/badmouth/slander/libel the efforts of DxO Mark.
Part II - Controlled tests
look at the pictures. Same exact lens, a Zeiss 25mm, used on the two bodies. One sucks when underexposed, or the shadows are recovered. The Sony-made sensor on the other hand, has amazing shadow quality, with virtually no noise. Look at the images, then go look at the DxO Mark scores, and see for yourself.
Oh-and this test? Performed by none other than Fred Miranda himself...a dedicated Canon owner and user. Huh...
People who claim that there is not a well-known, very real, very significant patterned noise problem with Canon's sensors are lying to you. Period. Just LOOK at the images. SEE it with your own two eyes. And then ask yourself, "Why do these guys try sooooo hard to discredit those who dare point out the truth?" Why? Why is that?
Once again...just LOOK.
Part II - Controlled tests
I...wasn't even aware that Canon has patterned noise problems. I've had mine for almost a year and I was happily shooting with her until just now when you pointed out patterned noise, which made me go through my vast archive of 1k+ images one by one to find such a thing.
now, I must say, I fell in love with Ari all over again.
to me, the DxO Mark scores and all your silly science talk matter not. if you have to rely on the absolute cutting edge of technology to create even remotely splendid pictures, I highly suggest you pick up economics because, as opposed to creating pleasing images, all you're doing is contributing to the ailing economy 'cause man those things are expensive.
a determined artisan can work around any 'problems' his tools of trade might possess. limitations exist to serve as a platform for creative solutions. cameras are only an extension of the mind and body. a man with a broken piece of charcoal can create art just as fine as those made by a man with a state of the art studio.
what do I care if my sensor has a significant patterned noise problem, if its sensor performance is reportedly lagging behind that of Nikon? show me a man who cares and I'll show you a man who likes to thinks he's hung like a stallion. neigh. (if you're actually that big then that last sentence got tossed out the window)
photography is too subjectively dynamic for the likes of you, you who think a sensor is a key determinant in the quality of a photograph.
I am a Canonite, and I have absolutely no shame in saying I'd enjoy a spin with a D800, if only because I want to push all those little buttons and see what they do; though I really want an a7II/a7s just to mount a Canon 50mm f/0.95 on the thing and feel like a badass. while we're at it I also want to try out a Leica M240, a Hasselblad 500C/500CM, a Mamiya Leaf MD, and a Canon 1Dx.
equipment are just that, equipment. what really matters is how enjoyable each makes the experience of capturing an image.
that being said, Canon and Nikon leapfrog each other like heck. one Canon day comes and another Canon day goes by, and all of a sudden tomorrow is a Nikon day and oh my, it's a holiday in the name of Sony - which passes by, and Canon looms over the horizon upon the next day. please, do wait to toot your brand name horn until your designated day.