There has been a trend lately (he past 10 years or so) about movies getting louder, with all the special fx and stuff. Whether it is from the editing or at the theater end, doesn't matter a whole lot, unfortunately my guess is that the theaters turn the sound so that it is loud enough for opening night with a packed house and noisy people. That means it will be painfully loud when the theater is less crowded and fewer noisy people.
I always try to carry earplugs to the theater with me anymore, occasionally for a slow-moving drama or "chic-flic" I might leave them out, but I usually put them in. With the Ety earplugs I get most of the dynamics and an even response curve, I occasionally miss some of the quietest parts, but that is the price I'd rather pay.
We usually see about 6 or 8 first-run movies a year, we'll see Star Wars 2, Spider-Man, and LOTR 2 this yearon opening weekends, and maybe a couple of others. For most movies I don't have to see right away, I'll wait a month or so and see them at our local dollar theater. I do have a growing DVD/Video collection, but with only a 27" TV the experience isn't nearly the same as a theater. I'm waiting to see how HDTV pans out and prices drop before I spring for a bigger TV.
-Keith