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?

>>9
What's more entertaining is when you have to pass a structure FOO_POINTER which contains a single value which is a pointer to something.

Fuck Windows programmers. They all write code like they learned programming with QuickBasic.