Over the past 40 +/- years of hunting Eastern turkeys here in Alabama and several times in Arkansas, I'd say I have killed 3X as many before 08:00 than after 12:00. As for "afternoon" hunting, I do. And have had good luck in the time frame of 2:00 until they hit the roost. Most of the time when I hunt in the afternoon, I do what I call "field hunt" , set up on woods roads or very open areas of the woods or try to set up along routes that I have seen turkeys use regularly when headed to a roosting area.

My experience is that it is rather rare for a gobbler to be sounding off in the afternoon. They will very often react to a shock call. But for the most part my experience is that p.m. gobblers are quiet. But if you find a Tom that is gobbling in the afternoon ??? ... He is about as killable as it gets. I believe, though I cannot prove it, that a Tom that does a lot of gobbling in the afternoon is "henless" and actively searching for hens .... and therefore more apt to be called in.