ATI's latest update for its Catalyst drivers arrive rather late this month, but nevertheless, Radeon users will be glad to hear they can now grab the Catalyst 9.1 drivers over here.
This driver adds full support for the OpenGL 3.0 standard and resolves many issues for Windows XP and Windows Vista. You can read the changelog over here (PDF). There's no word about performance in the changelog, so I wouldn't expect any huge gains.
This release of ATI Catalyst™ provides full OpenGL™ 3.0 extension support.
The following is a list of OpenGL™ 3.0 extensions added in Catalyst 9.1: