Brian, 3 under is only an observation as far as anything goes, I've never shot like that, not once. I just see the difference in arrow flight and bow noise from those who do. I had a friend change it up when I was shooting with him, and he hadn't realized how much quieter split was. I don't doubt folks are real good with it.
I've been speaking with Louis, and he's recently shot a couple of fired up deer, and I have too over the years. I really think the deer ducking the arrow syndrome kind of goes away when the bow is so quiet. The Texas crowd has a thread about just that. Those deer are skiddish and they are aiming almost at their feet....