I should have added below that although I have not shot a crossbow, I suspect guys adding draw locs to their existing bows will probably shoot more accurately than those just starting with a crossbow. They are already familiar with the bow and the weight and ergonomics of a crossbow would seem to make it more difficult to shoot off hand(like most treestand and ground blind situations). With a shooting rest, it's probably a tie. You probably already know, but it might be a marketing point for you.
Inline Crossbow - Why use a crossbow?