it's pure physics - longbows with curves to the limbs (r/d) will typically be smoother releasing than 'hill style' longbows with reflex, back set or plain ol' straight limbs.
typically, you can reduce or pretty much eliminate the 'shock' via form and heavier projectiles - just like rc sez.
i also agree with pavan that this kinda poll will only obfuscate and mislead, to some degree.
i've had a gaggle of hill longbows over the decades, and i'm fairly good at shooting such bows without much, if no shock at all. it's all in the grip/form and heavy shafts. after awhile it all becomes second nature.
... and then there are some folks who will make themselves believe that their hills ain't the least bit shocky at all when compared to most any r/d longbow ... and that there really is such a thing as the tooth fairy.