The AAA status this game is receiving are in terms of it being multiplayer only and not comparing it to something like Bioshock. I don't think it's a AAA game but that's just my opinion.
It's certainly a fun game, but that's about it. Worth picking up if you have a PS3 but nothing to make you run down to your nearest store to grab a system just for this game and imo, a AAA game should make you want to own THAT system. Therefore in my mind, there are very few AAA games in gaming and Warhawk definitely is not one of them.