Stereotypes are never good... but... they become stereotypes for a reason. I'd wager a guess that this reason is simply that Apple users are prepared to pay more for what, in some people's eyes, is the same thing.
I find this discussion interesting because I was sitting in an Indian restaurant on Tuesday night with two close friends: one recently bought an iPad (his first Apple device) and the other has an iPhone and also recently bought an iPad and a Mac Book Pro. I would say that this second friend might qualify as "rich" (being an airline pilot), but probably not that trendy. Computer literacy is average.
A comment he made, that stood out to me, is how easy all his "iDevices" are; "I don't know how they do it, but all my photos synced from one to the other [...] I've no idea where they're stored on either device [assuming he meant the iPad or MBP], I just tap on photos and there they are".