I am a computer engineer at UCI, so here’s my 2 cents:

My friends in engineering classes all use PCs (5 tablet PCs including mine + some linux users) with most of them very knowledgeable. (Some I don’t know why they are computer engineers, though :P)

My friends in art classes almost exclusively use iBooks, but they are mostly clueless about computers other than how to use it.(all of them were very surprised that I can write on my tablet PC screen.)

Again, not bashing mac here, I want a Mac Mini myself.