using auto-WB? I do not know anyone who actually does that. So none of my friends ever had WB-problems with their 5D.
those images are always forged and just made to attract hits to certain webpages

Been there, done that ... with the 40 D with the 30 D with and the 1Ds and everything. some good photoshopping though
Canon and Nikon both have more or less no information leaks. If information is released, that is always on purpose and well timed. Anyone who does let information out without being authorised to do so, will be quickly sacked and sued to hell