Depends on lot on which community you're looking at. Being primarily in the IRC/slashdot/web dev/scripting language/sysadmin areas (as well as a student of a rather Linux-centric university), I was amazed at all of the Windows-centric stuff when I found StackOverflow. I honestly didn't realize that there were good programmers who preferred to work on the Microsoft stack.

Now, of course, I realize there are, but I'm still a bit confused when I talk to one... our worlds are just so different.