Were the audience members just a bunch of yes-people? If the audience were comprised of real Star Wars fans, I would think at least half the room would have booed when Lucas came out on stage. I know if I had been there, I would have booed.
But would you have paid the money for a ticket and waited outside the convention center for up to eight hours just to boo Lucas?
No doubt the audience was biased - you really had to put in the bucks and the effort to get into the theater to begin with. I did it, pretty much just to have the experience of camping out for SOMETHING. But I also have loved Star Wars since I was a kid in the 80s, and I was still thrilled to be there, even though I would really like to see the original films released in their original form.
The promise of deleted scenes from the original trilogy was a nice surprise, though.