Jim, Agreed with your text. You provide useful info with your observation hives.
I have a hive that is exception to the norm. This hive bearded most of last year, till well after dark and sometimes still bearded in the morning. I added vents, added deeps, made no difference. This year same hive is bearding, I just checked 8:12 pm, 72F almost dark, yep, they are bearded. The only hive out of 14 to beard this way, all day and most of night. July and August, all night. The hive did not swarm in 2018. Calm bees I might add.
I just requeen this hive. In about 8-10 weeks I will know if it?s genetic trait or not.
Cheers