I've kicked more than a few hens off of nests over the years, and I hate to say it, but I agree with the "high noon" quitting time here in PA. I've already got back and set up with the camera after flushing a hen off of the nest, and within a half hour, she would come back to the nest. But if We could hunt all day, and the hen would get bumped off the nest more than once in a day, I think most of them would abandon the nest. I spooked the hens off while heading out of the woods after noon, which gave them a chance to get back on the nest without interruption for the rest of the day.
The turkey breeding cycle in My hunting area is different from year to year, and sometimes drastically! Last spring I jumped a hen coming out of the woods that had a bunch of few day old poults with her, and this was the beginning of the second week of the season. If You hunt an area that gets a lot of pressure and spook a hen with poults, one or two of those little ones are going to get left behind for fox fodder. I'm basing these judgements on past experience.