I don't view the concept of mentally adjusting to something to be insulting. I certainly do that, so I'll speak for myself. Whenever I change something around me, I adjust to it. Some things take longer than others. When I bought my second car in 2010, I had a bit of regret because there were things that I didn't like. Over the weeks, I adjusted to them and began to like them. Call it "car break in" if you want, but I don't think that happened.
Maybe speakers break in, maybe they don't. I figure if someone is happy with what they have, regardless of the reason, then it's all good.
Oh, and yeah...I'm jealous of you folks that have these.