Unlike the Catalyst 11.12 driver we looked at last month this isn't one we'd say skip. If you made the jump to Catalyst 12.1 Preview that came at the same time you might instead decide to make the jump to the official WHQL one that we've looked at today which is on a whole just a solid driver.
If you made the move to the preview driver last month you might want to do the same again this month with the new Catalyst 12.2 preview that's been released. With that said if you take the time to check out the Release Notes on the Catalyst 12.2 preview you'll see they're less focused on performance and instead the preview brings with it enhancements that focus on Eyefinity.
Unfortunately the HD 7900 series aren't supported in this driver nor the preview - fingers crossed that we'll see the HD 7900 series support be offered in the WHQL version that we'll see in February.
For the most part, though, this is a strong driver with no major issues present in it, combined with the normal line up of bug fixes that are always appreciated. Outside of the performance fix in Dirt 3 I wouldn't expect anything else apart from a little bit of positive moments here and there. For the most part, though, the new 12.1 driver doesn't offer any kind of huge performance gains and instead just brings with it the normal array of fixes we're used to seeing from most Catalyst drivers.