Why hope when if you look in the gallery there are plenty of hints that seem to state exactly that. e.g every single image states created and rendered in zbrush 4. No external renderers.
The second image in the gallery shows multiple maps like ambient occlusion map, shadow map, depth map etc etc.
I’m not saying I am right but it looks that way. Either way not long till we find out anyway.
Cheers
Mike R