Taking the general agreement between you guys that a very short bow is less accurate.......then why are mfgs. selling them and many archers wanting them?
Maneuverability. Also, the bow may not be any less accurate, however, it will be less stable. You put a 31" bow and a 40" bow in a shooting machine, chances are they will be the same accuracy wise.
Also take into consideration that many of the bows with parralel limbs are much more stable than the short bows of just 2 years ago. The longer riser definitly adds stability.