I use to be aware and noticeable of the TV commercial volume issue, but this past year I have not really noticed it so much. Last year they implemented the 'CALM Act' here in the U.S. (effective December 13, 2012, the FCC's rules require television commercial advertisements to have the same average volume as the programs that they accompany.). Now whether this is accurately implemented, I do not know. But I haven't been as aware of this issue in my TV viewing experience for awhile now. As stated, I use to be very aware and upset about it, so maybe it did do some good.
Rental or purchased movies on the other are a different breed. I have a good surround setup, and movie audio is an important aspect of movie viewing for me. But with some of the action movies, the audio volume imbalance is ridiculous. I can find a comfortable dialogue volume and be enjoying the movie. Then the scene changes or direction of the movie, and BLAM! The house is rattling and shaking. Granted some volume difference is expected and desired, but the
differences are not right. They are just wrongly mixed. Maybe for the theater experience this is tolerable (not necessarily correct, but tolerable for the viewing environment), but at home it is much more jolting. My wife starts yelling to "turn it down" and I have to tell her I am. It just takes a few seconds though to grab the remote and adjust the volume down. Then we get back to dialogue and have the reverse action ("I can't hear what they are saying"). I think a lot of the audio mixers in the movie industry are hard of hearing.