I preordered it a week ago. Normally don't give a damn about getting a game the day of release, but the bonuses of preordering seemed pretty nice ($5 off, in-game bat, early demo).
What bugs me is that the Gamestop employee whom I preordered from didn't know anything about getting the demo early. I don't know if he was just ignorant or disingenuous so that he could hand-out less demos and sell them elsewhere. I've heard bad things about Gamestop, which one reason why I rarely shop there, but I didn't know of any other store that offered the deal.
Anyway, I'll go back on the 27th with my receipt and see if I can get the demo.