Just to throw in some more information on this for you Dozer.
I have two machines,
One is - win7 Intel i5 2400 3.10 ghz 8gb ram and GTX650 and getting a frame rate of 195 steady on Judge dredd v5 - Smooth play.
Now the other is - Intel core 2 duo E8400 3.0 Ghz 16GB ram and Also a GTX650. Getting frame rates of 55 at max, on Judge Dredd v5. Most of the time its 25-35
This might be an issue of processor speeds/type causing the slow downs in VP10.