This is merely guesswork, but what, do you think, the patterns are? Do more Windows users convert to OSX? (Or do more OSX users convert to Windows?) And do Linux users (who most times seem to stick with Linux) convert to either Windows or OSX? You get what I'm saying. What is your experience? Do you find that Apple gets the most converts? And do Linux techies (if they have a non-Linux machine) run Windows or OSX? In my experience, OSX gets more converts from Windows (than vice-versa) and Linux users tend to side with Windows.