We just need to wait for the other reviews to come in to scale it up. On most games on metacritic there is that one or two reviews where everyone else is 90 and they are 40-50. Those are usually the bias ones.
For instance on the New Play Control games you can look at the comments and several of them say "This game is crap because it doesn't offer any new content!!!111!!1." The original game might've gotten a 95 whereas they give this one a 40. That is a bias statement because the game is called New Play Control. Its not a ground up re-make with new content.
If they were giving it a 40 because they thought the new controls sucked, then it wouldn't be bias.
EDIT: This post not so much directed at EDGE, as what others have said about their point system makes sense. More directed at others who give a Game of the Year a 40% or something.
