Easy people!
The game is out on Feb. 29th. The codes for the demo are going out on Feb. 3rd
Sony can easily have a demo out for the public in time for the game's release, and at the same time already have a word of mouth rolling on the internet.
Or maybe release the demo a little after the game, as it was already pointed out that Sony did the same with Motorstorm: Pacific Rift.
EDIT: Oh wait, those mails are only for online customers. Well, the demo will probably be available around the same time to those who pre-order in the shop, if not earlier. So my point still stands.







