IQ-wise, yes, we can have some arguments but Nikon seems to be better at IQ. The rest, it's a matter of opinion. For me, I like Canon system better than Nikon. I've tried Nikon before Canon but I find the Canon way of putting those buttons a lot better than the Nikon body. I also like better Canon lenses. The only lens I find Canon inferior to Nikon is 14-24 at least according to my hobby requirements.
Yes, but * Ken Rockwell * recons that if his public image is too much identified with Nikon it'll hurt his business, so he keeps on testing Canon stuff and making occasional public noises about it. You know Canon is in trouble if they receive pity reviews.
The result: Even on Canon sites his name * Ken Rockwell * gets mentioned a lot, so I'm sure the * Ken Rockwell * site rises in the Google pageranking - when you search for xyz Canon _review_, * Ken Rockwell * will be still at the top even if * Ken Rockwell * doesn't even bother to read the manual when testing gear on the * Ken Rockwell * site.