AMD just released the Catalyst 10.11 WHQL drivers, you can download them over here. Users of the Catalyst 10.10e hotfix need not bother upgrading though as Catalyst 10.11 WHQL is an older release that doesn't have the morphological AA feature.
The following performance improvements were observed with this release of AMD Catalyst 10.11:
Battleforge™ : Performance increases up to 3% on ATI Radeon™ HD 5800 Series single and CrossFire configurations with anti-aliasing disabled.
STALKER – Call of Pripyat™ benchmark: Performance increases up to 5% on ATI Radeon™ HD 5800 Series single and CrossFire configurations