Reviewers don't really give many games a fair review. Only exception I came across is NAG and Mygaming.
My case and point is Wanted game. Reviewers mostly said it was bad but it was actualy loads of fun. Yes there were only really 2 guns for most of the game and they were both hand guns, but the aerobatics and bullet bending was so much fun.
There wasn't anything new in Darksiders but they took a lot of fragmented concepts and turned it into an amazing package while a game like MW 2 which although had amazing set pieces and had breach bullet time, which has probably been done before in a game sometime, was really just another FPS yet it got rave reviews.