CS5 "Mercury Engine" and plugins using CUDA?

Hi,

just watch the sneak peak on the Mercury Engine again.

I see that the filters are being CUDA accelerated as much as possible thus leaving the CPU to do the other work. In the video it showed how AME rendered MPEG2 faster because the effects filters ran on the CUDA GPU thus freeing up the CPUs (4 quad cores!!!!!) to do the AME work.

What happens if a AME Custom Renderer is using CUDA too? I know that the CUDA-Runtime will allow for this but has the dev team done any testing with this mixed mode? And if so, can you share what the impact is multiplexing the two (or more) CUDA jobs was?