Look at Bioshock, how well does that run on most people's rigs, fantastically! I think Crysis will be the same, they're spending more time optimizing the games, and getting them to run a LOT better! It's well worth the wait, better than just throwing the game together with loads of bugs and half the world not being able to play it!
So the actual game comes out the 25th? What about the Demo?