I don't think that Jason (jakewash) was criticizing you, just saying that it was too loud for him.
You are correct though that many (most/all???) of the time when a room has a bunch of treatments in it, the sound that hits someones ears can seem to actually be *less* than an untreated room, thus the ability to play "louder" in a treated room without being painful.
Then, factor in that you might like to listen to things louder too, and that might make up for the difference in the preferred volume. Again, I don't know about Jason's setup, but I didn't see it as being critical.
