My theater was silent, but I saw it with no more than 20 people in the theater. I don't think I really heard a peep the entire 155 minutes.
Although I can't stand loud moviegoers, I would've loved to have seen it with a packed theater of fans. I saw both Revenge of the Sith and Batman Begins at midnight before opening day, and it's such a great experience. I love it when the whole audience cheers together during a great moment.
It would've been nice to hear everyone get excited after the main titles, but my theater was dead silent.