Euphoria I've been hearing some different things with regards to AIs in Crysis 2 based on some reviews.
They say that the AI are indeed smart and one of the best AI around. Crytek did in the past made a statement saying that Crysis 2 will have the best AIs ever and reviewers do seem to agree that it does indeed have great AI.
Though I hear that Crysis 2 is lacking major boss fights.