Tbh, i've played Portal 2 on my 360 and my friends PS3 and I can never recall saying to my mate, "Hold on a sec. Let me take another look at how smooth your picture frames are compared to my 360 version!" I makes me laugh when Gamespot or whoever do this whether it be the 360, PS3 or even PC coming out on top. The only time it would concern me somewhat is when I happen to play it on a freinds console or PC and straight away notice a difference. Not having to keep flicking my cursor over PC - PS3 - 360 to keep spotting the edge of a picture frame or a shadow under a toilet!