Nice, I believe it could easily happen. Unity seemed very off putting to me (especially with the original release). I know a lot of people who were upset by it, and I can see why - it is a fundamental change from what they know.
As much as I try to like KDE, I just can't. Especially on laptops. I'll have to try it again sometime soon. I like linux more than windows, but linux doesn't really care too much for most dial up modems... (especially mine).
That's true, but most inexperienced users really don't dabble too much with system configurations that much anyway.
(and I don't know where the topic of customizing the GUI came from..?)