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?

I've always preferred developing in *nix, due to the large number of tools available at the command line. I will comment that some of my colleagues used to develop their code in VisualC++ in windows, with the software being compiled and debugged on a remote linux box.

We're probably in the minority though. A lot of the software people use is windows-based, and developed entirely on a windows platform.

By the way, I hate the win32 API. There's a fucking datatype for everything. In theory this is good for catching certain possible errors; in practice it's a PITA and damn ugly to read.