Technically this is correct and it's a cool theory, but I don't buy it. I personally believe that anything you did to the shot you did before you released the arrow, unless the arrow or the string hits something on the way. Arrows leave the bow waaaaay too fast for us to actually mess anything up during the shot. I think what most feel happened during the shot actually occurred just before releasing the arrow, not while it was leaving the bow. If you are using a fingered release the arrow is gone before you can even get the finger off the trigger or register that the shot has happened. We simply can't react that fast. Any motion that could effect arrow flight or aiming was already started before the arrow left.

Brace height does effect string slap though depending on how your grip/form is, how big your arms are and how many clothes you are wearing. Which is why having a generous amount brace height is nice on a hunting bow. And the STS devices will help with that. However I thought the idea was to have the string NOT hit anything, not have it hit on purpose? But I guess I would rather have it hit consistently than just sometimes or to varying degrees.

When I look at a bow I am more concerned with reflex and riser length rather than brace height. If I look at two bows and one is 320 fps and the other is 330 fps but one has a lot of reflex to the grip and the other doesn't I'm picking the one with less reflex even though it might have a bit less speed, or even a lower brace height. Reflex will effect forgiveness because it helps induce torque into your grip. And I like a bow with a long riser as well, it seems more stable to me than one with a short riser and long limbs.

My opinions anyway.
Paul