As I understand it, the entire industry is like this. The reason you're constantly seeing drivers with performance updates and rendering fixes for particular ga

As I understand it, the entire industry is like this. The reason you're constantly seeing drivers with performance updates and rendering fixes for particular games is that they've put something in the driver to work around a mistake in the original game code. nVidia have a big developer support program, to the extent of sending their own devs to work on big titles, which makes this easier for them than AMD.