My opinion. From about the 2009 time frame. Only video that I know of that is still out there. Yes, it is long. I had several related topics on raw video most of which never made it to final edit and video. The grip is almost as critical of a topic, especially with the Glock and pretty much share a symbiotic relationship. Counter torque or counter pressure is not the answer. Guys using the modern ISO are finally catching on en mass to breaking forearm bone alignment and attempting to find a natural point of aim that I always related to the same concept as with a long gun and using it on a pistol. It's about time and better late than never.
http://www.youtube.com/watch?v=L6-eJTS_5qg