HardOCP has written a comparison of the performance of ATI's latest drivers, you can check it out over here.
Today’s testing is simple, we are going to take six games and compare different driver versions in an apples-to-apples comparison. We are using three different drivers. The first is the actual launch driver we used on September 22nd, 2009, when the Radeon HD 5870 launched. We will then compare that to the first official WHQL release for the Radeon HD 5800 series which is Catalyst 9.10 WHQL. Finally, these will be compared to the current Catalyst 10.6 WHQL driver to see if performance has improved over these last nine months. All testing below is done with a single stock Radeon HD 5870 1GB.