Looks like Gamespot didn't want to waste any time with the review and put it up first thing the NDA lifted to disrupt the meta ratings and possibly influence other in-progress review's scores. (which it seems it may have done) It may be a slightly bad game, but not that bad. C'mon, Dungeon Lords review even got higher score (6.8) than this on Gamespot! Really, this is silly... I am starting to hate Gamespot and others who pull this crap which in my eyes would not do well for their reviewmanship credibility.
They say it's RE5 with more Gears of War influence for part and more street fighter influence for part.
Given that RE5 was maybe a 6.0 I can fully see RE6 being a 4.5.