Isn't the principal objective of a thumbhole to lay the gun down more, so that you look down the barrel like you do with a rifle? Shooting a shotgun at turkeys with a tight pattern is anti-intuitive, because you ordinarily shoot a shotgun by "feel", rather than along a sightline/plane, right? And with a tight pattern you need to "aim" like you do a rifle.

Bowtech Dually, does that Beretta Extrema have dramatically reduced recoil, as advertised??