My experience tonight wasn't much better. I arrived at 10 to try and get a decent seat. We were only the second in line which is pretty sad for a Star Wars film. The line got bigger as time passed but the theater never even filled to capacity.
The loudest jerk in the theater decided to sit right behind me and he was drunk as a skunk. He shouted at least ten times throughout the night that, "THE POD RACE IS THE ONLY REASON THIS FILM EXISTS!" Amongst other annoying drivel. The crowd itself was largely the college set. There were also a couple families. I saw at least four fully robed Jedi in the theater with two people wandering around with clone trooper helmets on. There was a lot of Star Wars themed apparel.
As for the film itself....ugh. It was strange I've seen TPM a respectable amount of times but I ended up catching little lines I didn't remember hearing before. Which was odd because I thought I pretty much had that film memorized. The 3D was terrible! There's depth but it was almost indiscernible. The other problem was that they didn't bother to brighten the film to counteract the darkening of the 3D glasses so the whole film is pretty murky.
The only part of the presentation I found enjoyable was the sound. It started off really quiet which is not what you want right at the beginning of the film when music kicks in but I think they eventually figured it out and turned it up. Very rich sound and I think it really underscored the fact that I need to get a good sound system for my home. =P