Seems pretty obvious it's a fake. Developers never deal in absolutes when they discuss multiplatform games, it's always, 360 is the lead platform so it may have slight advantages but on the whole it'll be un-noticeable, or vice versa for the PS3.
Having played MW1 on both PS3 and 360, I can honestly say that the only advantage either has is that the 360 has a larger userbase, so there's a better chance of me finding a lag free game. Other than that, there's nothing between them that impacts gameplay.







