It's like comparing apples and oranges if comparing John Erickson's version of hitting to the TGM hitting described here. John teaches a pivot driven swing with active firing hands and an inactive right arm through impact - for John, hitting means the firing of the hands, not the forced straightening of the right elbow. He maintains that Knudson and Hogan swung/hit with active hands to release #2 and #3. From my own tinkering with this type of swing, I agree with him.