Caved in, bought the game. Looks great. Your character/movement is much more fluid (without delays) than ArmA2, which is great. Performance is pretty good on high-highest settings. Animations look great and I love the new stances, gun sounds are awesome too.
The only movement delay I did notice though was when you try to strafe with A or D with your character, there's a 0.5s delay from when you press the strafe button to when your character actually moves. Not sure if that is intended for slower pace gameplay/realism or not.