I have had a few, and while I certainly could feel the handshock regardless of bowstring and/or arrow weight, there is no doubt that dynaflight combined with a heavy arrow would get rid of the annoying vibration and bring the bow to a level that was not annoying...although still clearly noticable, it just didn't bother me.
I agree that one must hold a HH bow correctly...like a suitcase as HH himself put it. With the right grip, a bent bow arm, and the proper follow through...the thump of a Hill type bow certainly remains but it shouldn't hurt. If it hurts, I would say one is either gripping it wrong or needs to bend their bow arm some.
Now...all that said, I moved to the r/d longbow because I feel a well designed one will do everything a Hill type bow will do and do it better...maintaining the stabilty, durability, and quietness of the hill bow, but getting more speed and eliminating the handshock which can break down some archer's form.
Despite the stability of the longbow, the scores of top recurve shooters is often higher and I think it is because few archers are able to maintain their form when shooting a bow that has so much "action/reaction" as such causes an archer to react. Few react with the right follow through because they don't start out with the right position for that type of equipment.