Thing is, game reviewers won't give games high scores, because otherwise the developers/publishers might get pissed, I very very much doubt it happens on any gaming website. This is simply because usually developers know what game they are putting on the market, and they'll know wether it's gonna make big bucks, get raving reviews, or not I've burned down games down to the ground, from a publisher we have a pretty good relation with. They knew it would happen though, and they will still give out review copy's, lol.
So in that way, reviews should be somewhat objective, but some reviewers don't like this, or they love that game, and the game they are reviewing doesn't have it, etc etc, and thus games get different ratings all over the place. Getting different kinds of perspectives is thus a good way of forming your own opinion about a game. And there will always be fanboys so you've gotta weed through those comments as well.
In the end btw, I really doubt gamers get influenced much by the reviewers opinion. They care mostly about what they can expect from a game, and wether it will be right up their alley, or not. System requirements are usually important too, and they can get a good feel of the graphics through reviews. Wether the gameplay will be something for them, is usually not influenced by the reviewers opinion. And if the game is buggy as hell, they often decide to wait for more patches and see if it fixes stuff, or not.