Truth.
I am user of all three systems (Macbook Pro+Homemade PC), and they all got huge problems.
Snow Leopard - Damn thing crashes very often. Maybe it's not the bluescreen, but there's no real difference - just a spinning ball, and freezed computer to restart. Problems with handling NTFS files, crashes 30 percent of times when i copy something to external memory of any kind. And my printer doesn't work there.
Linux 10.4 - Although it haven't crashed (but it may be because i don't spend much time there), there are many problems with programs, installing things is hell, and there are no noteworthy substitutes for many essential osx/windows apps. Working there requires knowing command line.
Windows 7 - Unluckily for this comparison i had to think a lot to find something bad. Just as Linux, when used normally, it does not crash anymore (last bluescreen i remember was in Release Candidate version, during installing of beta drivers), but when you make too much mess it will slow down - registry still present.