Sure, to Windows those third-party drivers are just binary blobs. When Windows encounters an infinite loop written by some sloppy driver programmer, what options does it have? OS X has to deal with this problem far less frequently because all of the components that go into Apple computers are carefully vetted by Apple to work flawlessly with their own OS.
What OEMs did those organizations purchase from? I'm guessing Dell? That seems to be quite popular with businesses. Those major OEMs aren't exactly known for using carefully selected, rigorously tested components. The frequency of BSODs testifies to that fact.
At any rate, BSODs are much less common these days because third-party drivers have better tools for testing their code (http://www.zdnet.com/why-the-blue-screen-of-death-no-longer-plagues-windows-users-7000021327/). Windows 7 is a rock-solid OS. In fact, my mac has crashed far more often than any windows 7 machine I've used (but I'm willing to accept the possibility that my mac might just be a lemon).
Edited by d4NjvRzf - 10/1/13 at 8:20am