10 hours total usage, only down 20% with an hour of pretty vigorously used screen-on time. 1.35ghz OC, on demand governor, stock kernel and Wifi enabled the entire time.
No excessive amount of wakes and phone sleeps pretty well. Doesn't always go into a super deep sleep but this observation... meh... I'll wait and see some more. Need to let more time pass but so far it's blazing fast, very clean, no FCs and much better battery life than I had expected. I really didn't think these nightlies would be THIS polished.
I'll report again after more time passes. I really did not expect this to be so well polished right off the bat. Many thanks to the dev for whatever it was he's done with these releases. Saw a few of his other threads and looks like lots of satisfied users.
*** Edit ***
22 hours total time, 50% battery, 1 hour and 50 minutes screen on time. Haven't used it too much but when I have it's been pretty intensive. Very pleased so far!