LOL, I really donít see it. Maybe that is why I am a hack?
The TGM pro that I had lessons years ago said that the drop down move was what separated the men from the boys. When I got it during a lesson I started hitting the ball to right field. Then all I had to do was release and bingo I hit the best shots that I had ever hit up to that point. I lost that feel though and only got it back on rare occasions. One time when it worked at the driving range I was hitting 7 irons into the net at the end of the range (normally a wood shot for me) with no effort at all. Some guy walked by and asked me if I was hitting a 3 iron. I remember he turned kind of pale when I showed him it was a 7. LOL, the next day I was back to hitting the 7 iron 150 yards.
When I look at the drawing on page 91 and also on 94 and 95 I see the shoulders turning close to 45 degrees and the right shoulder dropping considerably. The lead arm is actually closer to the top of the right shoulder in the second drawing, meaning that there is no independent vertical drop of the lead arm that I can see.
Also, Peter I remember a post of your from several years ago where you said something to the effect that you understood how Hogan got his arms and hands into the hitting position by moving his body. If you remember that post how does it fit in with what you are saying about vertical drop now?