I wouldn't trust any score on pretty much any site now, sadly. Too many idiots simply vote to express an opinion and an uninformed and biased one at that. Probably half the votes for a title like Gears 2 are PS3 fanfolk voting it down and it's probably the same for big PS3 titles, too.
I might look at the odd individual vote, but really, when you see the red 0 and 1 you know all you need to know, that the vote is irrelevant and either by someone without the wit to understand what they think they're voting on or a deliberate Troller voting something down.
Sadly, for a long time on the internet the trend has been to learn what to trust and what not to trust, and sadly the list of things not to trust grows a lot larger and faster than the other.