Note she makes a point about needing to be able to reach the mag release while the gun is in a full firing grip. Conversely, Shannon Smith says there is no gun on the planet he can reach the mag release while holding with a shooting grip. I'm with Mr. Smith on this one. You may be able to reach a mag release on some pistols with a shooting grip, but I wouldn't expect it. In addition, there is some advantage to not being able to reach a mag release with a shooting grip as you can't inadvertently drop a mag while you're shooting.