This is 4 years old, and I suspect Apple's position has only improved since then, but see http://fortune.com/2010/08/07/big-macs-on-campus/ . To your "dueling anecdotes" point, it's also clear from this article that some universities are much more Mac-centric than others, given that one survey of 5 universities showed 70% of incoming freshmen came with Macs.