Hm. I have noticed a framerate drop recently, but I'm not sure if that's the patch, or just because the official NA servers are filled up with 100+ players pretty regularly now.
I've got 4gb RAM, 1gb VRAM, and 2.27gHz CPU, so I feel like I shouldn't be getting a framerate hit, but when servers are filled up I'm running at around 30-40 fps. It's not unplayable, but it's just so much better at 120 fps.
