Dave, you're probably right.
Dennis, I'm thinking as you do that there are WAY more PCs out there than Macs. However, I have spoken with several folk who use PS and there's a definite leaning toward Mac users. Seems that for years, the only way to do high-end graphics was with a MAC. Had something to do with on-board graphics or built-in graphics processing on the MB or some such thing.
Mac loyalists may have followed the swing toward PCs, but I'll bet there are still lots of pros out there who wouldn't be caught without their Mac machines. This includes two friends that are my mentors in learning and using PS. Every time I have a question for them, they start with "If you had a Mac, it would be easy to..."
Tom Ireland