Here is my thoughts and experience. This is one time it is not about groups. It is about one shot under circumstances you can not anticipate. So to compare the efficacy is difficult. For I know the confidence of being able to aim at or near the spot I want to hit is the only constant in a kill shot.
I know the fellow in the story is a good shot but after 1&1/2 hour crawl on stomach, hand and knees, the adrenal hit, your draw mouth and dilated pupils, trying to find the angle of the kill shot, all do not add to an instinctive, split vision or ??? Accuracy.
This is the time and situation that direct aiming is IMO the one thing I can depend on. If I can just get to full draw, the arrow going to be at least an 8 if not a 10.
When using a fixed crawl you still need to burn that hole. Often if the deer gets up, etc, you lose the spot and just aim at an area.
IMO
