Scores have their place - they aren't the be all and end all but can be a valid use of the reviewers time and can improve the 'review experience' for some people. Equally, however, a general feel of a game IE something between 'Buy this or you suck' to 'cut you balls off and eat them with crap sauce, it would be less painful' - to give the customer a bit of a view of what the game is like.
The problem is that game magazines are using a flawed system. Everyone knows that if a game scores less than about 70% it is probably less fun than cigarette burns, which means that inevitably reviewers are giving vastly more 90%+ scores than can possibly be rational. (Movie reviewers tend to be the same, albeit less extreme; but think about your favorite movie reviewers scores out of 5; a bet their average is a lot higher than 2.5)
The whole system is just massively red-shifted. Games are going to score 10/10 because they are simply better than game X which score 9.5/10, and the scale has no more granularity than that.
