I'm a fan of Windows, specifically Windows 7. For the most part I like it better than OSX. I have 4 Macs, 3 Windows machines and 3 Linux machines that I access regularly.
But...I work on a relatively large project. Windows is literally an ORDER OF MAGNITUDE slower to checkout, to update and to compile and build than Linux. What gives? I don't know this is the fault of Windows. As far as I know some of it is the fault of the software I'm using not using Windows in the correct way to get the maximum speed.