I think it's safe to say it makes a hell of a difference, I always had one or two arrows 3 or 4" off the target when I emptied my quiver due to handmovement.
I'm sure if you had a custom made handle it would even be better than the wooden ones from Bowtech but even so, compared to the plastic one it's soooo much better.

and def. no more torque issues for me......

you can check out some pics here;
http://www.flickr.com/photos/69041177@N00/

F.
Belgium