Just one small gripe...

[ShadowXOR]

I was disappointed in how short the demo was as well.

However, I see why they did it. I played enough to know that I wanted the game, and since they are releasing the game in three episodes, each episode is much shorter by itself than a full-length game. If the demo was too long it would cut into a much more significant portion of the game than a longer demo would for a full-length game like Half-Life 2. However I do think it was a mistake for the team to not include one REAL combat situation. That is a significant part of the game (even if it isn't the focus) and if people can't see that they may not buy it. A big mistake there in my opinion.