Billy Schott's training and advocacy of thumbs forward at FLETC was also impressive, but from my observation it suffered several problems. It weakens weapon retention as was demonstrated by instructors who could more easily wrestle away a pistol due to the primary hand thumb not grasping the grip, but the off hand thumb. Shooters firing only in DA mode suffered weaker scores due to lack of security on the primary hand while trying to make fluid trigger pull over a longer distance. Shooters trying to fire with both hands from their patrol vehicle lacked dexterity in their movements with thumbs forward, and when they tried to switch back to a standard grip they were unpracticed and did poorly. More officers suffered mobility problems with confined building search techniques. Lastly, officers were more prone to tripping their slide release levers(to activate, or prevent activation) especially when wearing gloves and particuarly under stress.
It's a great technique, but to say that it is the end all be all of grip holds is like saying the Titanic is unsinkable.
