Haven't tried this driver set yet, so it would be nice if someone could test them and report back about the performance increase in comparison to the Catalyst 10.3 drivers.
Sticking to its announcement, AMD released the ATI Catalyst 10.4a Preview driver suite. In the run up to Catalyst 10.4, the company wanted to quickly resolve an important issue pertaining to Battlefield: Bad Company 2 game load times, which made it release a series of preview drivers, starting with Catalyst 10.4 Preview which resolved the issue for ATI Radeon HD 5000 series GPUs, and now the Catalyst 10.4a Preview, which resolves it for ATI Radeon HD 4000, HD 3000, HD 2000 series GPUs. With this hotfix applied, users will experience reduced map game load times on Bad Company 2. Catalyst 10.4 WHQL will be released later this month.