Well, 22k reviews on steam and 'Very Positive'. This is the only kind of reviews I trust.
My two dimes:
That is the only kind of review that doesn't matter because is based not on a critic and rational analysis of the game but by personal feelings (by the way I love the game just to be clear on my position), IGN and so on are professional reviewers who read the game from a more dettached point of view.
(And to me the fact that something is love by an awful lot of people doesn't imply that said something is good, it made things just widespread).
Also I can understand the low rate gave by those sites, the mix of awful movement, combat system that dilatate the lenght of battles, dialogues than are in the average of computer based rpg, the distance between expectation from a sequel of an iconic game and the outcome, the cinematic serious bugs (aahhh lost count of how many times I talked to walls, back of necks, shoulders and so on

), the really thin personalization of characters specially in skills and stats, how penalized is the rogue class whose class skills (pickpocket, lockpicking, stealth) are pratically open to all the other classes, is something than can not be ignored so easily specially if it comes from a firm that has made its name with the two underdogs Original Sin.