A backlash was inevitable.
BioShock is amongst the most critically acclaimed games of the year. In terms of Metacritic average, its only peers are Super Mario Galaxy and Halo 3. You'll note, bar minor sniping, their status hasn't been questioned anywhere near as much as the adventures of a man with a wrench in Rapture's. This, also, is inevitable. They're known qualities. Everyone, to a lesser or greater degree, has made up their minds already. If you can't choke down the saccharine standard Mario world or aren't convinced that Halo's combat mechanics are anywhere near as elegant as its devotees make them out, you're highly unlikely to play them. There's much to hate in both games, but their fans simply don't care and those who aren't fans will never throw away forty quid for something that isn't to their taste.