And it has also been pointed out that the graph he listed is not just discreet cards. Intel had, by far, the most graphics drivers out there, probably as many as AMD and Nvidia combined. Yet Nvidia has caused more crashes than Intel or AMD put together. Both Intel and AMD also had chipset drivers, and Intel had other drivers as well.
I wish people would stop trying to discredit this data just because they do not like what it says.
As far as drivers today, I cannot say I have any real problems with AMD drivers. It seems that there are more Nvidia driver threads as of late around here. But as another poster mentioned, I don't upgrade just because a new driver is out. If I have a driver that works, unless a new driver has a feature I really want, I stick with the driver that works.