How much of that difference is because of the driver and how much because of a bad port from the game developer? Remember all the console to PC ports with real

How much of that difference is because of the driver and how much because of a bad port from the game developer? Remember all the console to PC ports with really bad performance. Now add the lack of a financial incentive for Linux games. To put this in perspective, there are more Windows XP users than Linux users in Steam stats.