No. I still think he's an idiot. I won't trust a site that looks like it was designed as a high school students website. As I mentioned after, I'd need a review to be done by a legitimate source instead of this guy posting pictures from photoshop which can easily be edited or changed to prove his point.
Bayer arrays actually cut your effective resolution to about 1/2, so you actually have about 5 effective megapixels in a 10 megapixel camera. That's in "typical usage", obviously if you're shooting a scene lit with narrowband red light, for instance, you're down to 2.5M. If you're shooting a monochromatic scene lit with pure white light, you can have all 10M, but you probably need to mess with the RAW converter to make it stop trying to recover color information.
Ctein and Mike on this very topic: The Online Photographer: Mike and Ctein Discuss B&W-Only Sensor Implementation (Digital B&W Part III)
Ctein is not omniscient, but on these sorts of topics he may be taken as completely knowledgable.