Just so nobody gets swallowed in awe over pie-charts -- don't forget that all the 'benchmarkers' out there tend to bench on windows because that's where the tools are.
As a hardware geek, I can tell you, I've crashed the nvidia driver hundreds of times in a *DAY* just trying to find a stabilized overclock -- and considering nVidia has classically been the Chip of The Overclocker, it does not surprise me in the least to see nVidia as the leading cause of vista crashes when the G80 was released.
... What scares me more than pie charts is that Microsoft has automated collection of millions of machines, all dumping into these huge QA databases, and NOBODY seems to stop and think, "Hey, Quickbooks just crashed and Windows wants to send a partial memory dump to Microsoft's QA database..."
Someday, some sneak's going to mine that DB for all it's worth. That'll be one interesting day. There could be just about anything in there, considering the general quality of the 3rd party code in that ecosystem.