Yeah, mainly due to the cooler weather, but I've had good luck with it in all conditions in the past. IDK, for me, it seems to inhibit re-growth a little better than Dropp, but I may have been comparing it to 1 oz Dropp instead of 2. But it definitely does better than Dropp when it's cooler.
What did you use for your second shot? I usually wait 5-7 days between shots and two weeks after second spraying before picking. Do you do about the same? Just curious, I know some here start picking 7-10 days after spraying ethephon. I just can't seem to get all my bolls open that fast. Of course, I know a lot depends on the weather and the temps.