The last movie we saw at the theater was, "Open Range". And yes, it was far too loud back then. We never went again as a result. I'm totally deaf in my left ear from childhood, and have only about 75% hearing in my right ear. And even I found the volume to be excessive. What is even worse are the high and low volume variations from the background music to the dialogue. The music blasts you out of your seat, while you can barely hear much of the conversation.
It's not just movie theaters doing this either. There is a good show on the Science Channel called, "Factory Made", and another called, "How It's Made". Both showcase how many different products are manufactured. On many episodes they all but completely drown out the narration with noisy heavy metal background music. It is so annoying to listen to, the program becomes all but unwatchable.