Hi Gradient, 
I downloaded the up date last night and did a test render at 1200 x 1000 and that rendered in 9 minutes where an image of the same resolution depending on the complexity use to take 19 or more minutes, on my system. 
it seems a lot more stable but I haven't really had a chance to push it properly yet? All you can do is give it a try and run you own tests. 
Regards to you. 
Cyber-Angel