The GeForce website now offers new version 337.88 WHQL-certified GeForce reference drivers for NVIDIA graphics cards. This is the driver set they recommend for playing Watch Dogs, and they also tout performance enhancements for other games as well. On a related note, NVIDIA also offers a Watch Dogs graphics, performance, and tweaking guide for NVIDIA accelerators. Here's word on the new drivers:

In addition to day-of-launch Watch Dogs enhancements, 337.88 WHQL also includes a wealth of upgrades and optimizations that boost system performance and improve existing features. Namely, system-wide DirectX 11 and SLI performance optimizations of up to 75%, new technology that reduces game load times, new and updated SLI profiles, and 3D Vision enhancements that optimize DirectX 10 and DirectX 11 3D titles.