Brad Abrams asks:
Then I thought I’d ask you folks – what do you value? What gets you to give high marks on the session survey? (we take that very seriously you know)..
Make demos simple. If possible write them by hand. Use as little as possible precooked. Describe every line, method and mechanism. Don't demonstrate 7 pages of code. Things can be done efficiently in 5 lines of code for demonstration purposes. Entertain.