Funny how that works :) I've seen speedups in most of my renders... Noticeable speedups! There is a thing that you can't just blindly set the pass amount / noise limit but look at the image visually after a set amount of time. I believe thats what Ondra said in the Daily Build thread too.
Yes, I must agree! Usually I render to get 4% of noise, but after installing daily build of August, 28 it seems that we get less noise even at 6%. That is why I am confused. For now my decision is to stay with C4d and Corona.
Yup, it has caused some confusion in the 3ds Max part of the forums too. Bottom line is the new performance updated should make the render clear up visible noise faster but overall, time : time, it doesn't change much. So basically you need to put in a higher noise value (from 4% to 6%) and that will still produce a clearer image faster.
I am guessing its because the new image sampler focuses on the "visible" areas more and so whatever is in the dark / should not be visible still is noisey but overall the image looks clearer.
My 5 cents ;)
edit:
Turns out the new sampler is already in.
"Changes in 2017-07-24 (
https://drive.google.com/drive/folders/0B7xyYS3daSJ7V3BJZWlMR2EzUG8):
Added new and improved image sampler, capable up to 100% speedups, on by default for all new and old scenes"
I do wonder if the adaptive lights thing is coming / is over too :)