My shortest hunt was probably about 20 minutes after first light. Never had one pitch right down in my lap off the limb (though I've seen 'em fly down in my direction & walk in). I always get to the area I intend to hunt at least an hour before it gets light, so I've been sitting for a while before it is even light enough to see or shoot.
Not to hijack this thread, but how about your longest hunt (post contact with the bird) until harvest?
In 1996, about the third week of the season around 10 AM, I had one stay within sight for over an hour, just across an old logging road from me. It hung up real bad on a slight rise around 70 yards away and he did not offer a clear shot until he got inside 20 yards. There was a low spot along with a lot of young pines & broomstraw between me & him that was like a wall. He gobbled somewhere between 70-80 times before my purring & scratching the leaves coaxed him in. He just kept strutting back & forth to where all I could see the top of his fan and his head at times. He suddenly quit gobbling and I saw him headed my direction through some limbs. Next thing I know, he is real close just across the roadbed. After the shot, my guts were in knots, I was shaking, and I'd worked up a sweat just trying not to get busted.
We have taken at least a dozen Longbeards from that same spot, but they usually come straight down the road, not from across it.
Luck Counts, good or bad