Linux vs Windows: What do programmers use.

I was woundering if it is a common theme for most "Pro" programmers to use linux. I mean a book called C;Programming I have was written on linux. So which OS is it that programmers or hackers, per say, use?

Linux is not a desktop kernel/OS. Forget the slow shit that is X; it's worse than that. Try doing something CPU intensive and watch your music stutter and sometimes stop playing all together. Windows on the other hand, doing CPU intensive things, the GUI still works and the sound output never stops. Think about it. I use Windows because it is simply better at being a desktop OS. And I don't use Mac because I haven't bought one yet (this is the only reason).