Perhaps, but somebody in one of my classes had jailbroken his iPhone and was showing off his fancy home screen, which would have been pretty par for the course for a custom Android home screen, and everybody was oohing and ahhing at how cool it was. Really just anecdotal, but I don't think iPhones are more popular purely because they've considered both options and chosen the one they liked more.
But the jailbroken phone comes with iOS and the custom Android home screen doesn't. I'm not seeing your argument here, unless it's "stock iOS isn't flashy" or "jailbreaking is cool".