If the game sucks, why have all the preview events like PAX been hands-on? DNF has been in playable form at EVERY game event it's been at. If they were afraid the game wasn't any good, why not just show a trailer? Why let people go hands on with it? And like I said, most people who've played it at the preview events have come away impressed. Gearbox is just being stupid as shit with the demo and that's all it is.
I'd also like to add that I really don't think Gearbox would have paid $20 million for the game's code and IP rights if they didn't think they had a winner on their hands. In an interview Randy Pitchford said he played through the entire game before deciding to buy it from 3DRealms. I don't know about you, but I wouldn't dump $20 million on something I thought was shitty.