It's running quite good on my AMD 7950. Had a few sessions but Im satisfied with the performance, GPU utilization stayed in the 70%-80% region even with V-sync on. I'm on the AMD 13.10 Beta drivers btw. Playing on Ultra it more or less performed like it would on BF3, except when there were massive smoke/particles.

Was playing on a US server and chatting with them, it seemed like Nvidia cards(even highly beefed ones) had stuttering issues.

IINM there was a beta driver released yesterday/day before with BF4 SLI profiles and optimizations.