I get the impression they just read other reviews and watched trailers and spent more time retyping the 'bad' than they did the good.
I also really think that reviewers do not know what they like about games in general..if its arcade driven action, they want cinema, when its cinematic, they want action, when its deep they want blood and guts, when it has blood and guts they want meaning...seriously...BAH
Visual 'flaws' should not include stopping in a place no one will stop, looking to the left, and then down to the ground, and then looking through the scope at the dirt to see what the texture there looks like. You want nice dirt fine, you'll get pop in...then they'll complain about that.
(this is for all reviews for all consoles)