I actually like the scores that Metacritic and Game Rankings provide; by including a bunch of reviews you *tend* to normalize the score. I'm not trying to convince anyone to agree with me, just stating my reasons for liking these sites.
The trick however is that as more reviews are added, the score should be more normalized; and here is where the linked article tends to be a little misleading...for example, Prototype on the PS3 was reviewed by 48 sites, and received a score of 80. Prototype on the 360 was reviewed by 78 sites and recieved a score of 78.
Given the idea of normalization, I would posit that prototype is more of an 78 game, regardless of what platform it is on and NOT that the PS3 version was "reviewed" better, as this site claims... That however would not support what the author was trying to prove I'd guess.
That being said, if games across platforms were reviewed by approximately the same number of sites and one normalized to a higher score, I would be the first to acknowledge that it was a better reviewed game, regardless of platform.
