Honestly guys, arranging your precious time around a demo, much less a demo from Valve of all companies, and being surprised when the deadline is missed is just being stupid. It's a demo, be thankful PC game developers still make them.
Speaking of which, why do pre-orders get early demo access anyhow? Isn't it better business sense to give everyone else similar access so more people order? I mean you may as well cut the demo altogether and spend the effort on the main game.