I hadn't done this drill in a while and the discussion peaked my interest, so I tried it a few times today. EDC Glock 35, 180 grain MagTech ball. B-8 at 10 yards, 10 rounds from the Low Ready.
I was able to consistently clean it in the 7.5 to 8.0 second range, but if I tried to drop ANY below 7.5 I started to lose 2-3 rounds just below the black. This tells me I have been laid off from practice too long and need to work on my trigger control.
This drill is a better test than its simplicity might suggest.