I actually know quite a few ex-university biologists (who are now in the biotech sector) who used Macs while at university (because they were supplied by the department), but ditched them as soon as they possibly could when starting their own company. I also have friends in graphic design who started out on Macs, but moved across to PCs later on in their careers, and are quite happy in Wintel land. Switching does flow both ways. In fact, now that I think about it, I know more people who have gone from Mac to PC, rather than the other way around. Maybe it's something that happens to frustrated university scientists when they get into the private sector.
I agree. If Apples were cheaper, then we would see a lot more people switching. But they aren't, and I can't really see Apple getting into the budget arena. They seem quite content to stay at the premium end of the market, making nice margins on nice hardware. The marketshare tells the story. Approximately 98% of the market (insert your favourite marketshare estimate...they're all between 90% and 99% somewhere) says "Thanks, but not at that price".
