Holy crap, this new adaptive sample is blowing the previous one out of the water. I have only done one test on a small image for now, but the results are night and day. In the example 10 minute render below, v5 got to 8.46% noise level. the v6 daily got down to 0.43% noise level! FYI, the black areas are a hold out I setup to speed up rendering.
Also not to mention the speed ups in the geometry stage. This is insane, my renders are going to be so much damn faster. I am very impressed.