I don't have a card to test on, and I'd like to get some feedback on how well CS6 works with GPU acceleration. 

Is anybody out there using a high-end GPU with AE (Quadro 5000, Quadro 6000), and if so, what are your rendering experiences like? Specifically, I'm looking for real world experiences with day-to-day motion graphics work, not looking at performance with actual 3d Ray Traced objects.

Is the benefit conferred by GPU seen in any comp that uses 'Ray Traced 3d' renderer, or does it only accelerate actual 3d volumetric objects (ie. 3d extruded text)? Basically, I'm wondering if I had a 3d comp designed in 5.5 (ie. a 2.5d comp) and opened it in CS6 and changed the renderer to 'Ray Traced 3d' if the GPU would accelerate this comp, even though there are no 3d ray traced objects in it?

And one request for confirmation: reading experiences online, it seems that when using Ray Traced 3d, multi-processing gets turned off. Can someone confirm that this is indeed the case?

Thanks,

Alan