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?

Visual Studio is a really good development environment. Maybe not perfect, but for the money (free) it's pretty awesome. It only makes sense that when you use it, you use its native environment.

Linux is used by programmers who want to program Linux (perhaps in a fruitless attempt to get a joystick or other standard peripheral to work).