The 11.1 driver isn't the most exciting one and to be honest it doesn't come as a surprise. For starters, the 10.12 was a big one thanks to the introduction of that sexy new control center. The other reason is that January tends to be a fairly quiet month as we imagine the Catalyst driver team takes some much deserved time off.
To be honest, though, I think in the coming months we'll see some improvements since NVIDIA have become extremely aggressive, and that's best shown with the release of the new GTX 560 Ti which offers great performance, but more importantly at a great price.
We know that AMD are able to offer us extra performance from the drivers and the HD 6000 series have really only just hit us. In this case this is the first WHQL driver for the HD 6900 series.
The release of a dual GPU HD 6990 will mean strong concentration on Crossfire and tessellation performance is becoming a big thing. AMD have improved it a lot in the HD 6000 series, but I think we'll see them offer some fresh gains with the release of future drivers.
For now, though, it's hopes and dreams. It's probably worth the upgrade, though, for the most part because it's the first WHQL driver for the HD 6900s. There are of course always those little bug fixes that are addressed each month as well.