Maybe it's a good way to kill that awful tink of carbon fiber shafts? not to mention the rebar feel. He may be on to something here.If you've ever tried to remove VHB, you'll know what I'm talking about. It is most commonly used to attach automotive logos to cars and is a bit "rubbery" in its feel. I would guess that it would have a noticable influence on the feel of the hit.
I've got a roll of it here, and a few junky house cues, perhaps I'll give it a try