They do it all the time. I often feel they get it wrong. They should only use sources with a score IMHO. You can't take a wall of text written by someone else and assign a score on their behalf as far as I'm concerned.
I doubt its some big conspiracy though as no doubt you could find examples for 360 games as well.
Also I wouldn't see Variety as a particularly good game review source either...
Try to be reasonable... its easier than you think...