Indeed, it's dumb to make you preorder to get the demo. I mean, what's the point? If I preorder, then I must want the game anyway, so why give a demo to the preorderers? They obviously don't need to be enticed to buy the game.
Give me the demo, let me try it, and if I like it, then we'll talk about me buying the game.
Anyway, my GS didn't have any of the demos. Oh, well. I'm sure that it'll be on next month's OPSM demo disc anyway.