Keep it simple? Please don't!

I'm not gonna talk about a certain session, but want to give an overall feedback. I've only attended a few sessions and workshops, but over all it seemed a little too basic sometimes. Some speakers used up a lot of time to explain basic things like "What is Web 2.0", something that should be basic knowledge for people attending a Web 2.0 Expo.

Especially compared to the BarCamp taking place the weekend before W2EB some sessions were not made for specialists, but more or less for people who want to get an insight of what all this Web 2.0 is all about. I want to point out that this is just my opinion as someone who spends a lof of time with 2.0 stuff.