Gentlemen, this has been a great thread!!
Again, I’m going to advocate for a holistic approach to mechanics discussions. I find statements like drop 'n drive, tall 'n fall, drive with the back leg or pull from the front side very limiting in providing productive cues or advice for getting aspiring pitchers to achieve the desired results. Yes, it’s a pull from the front. Yes, it’s a drive from the back side. Yes, it’s drop 'n drive. Yes, it’s tall 'n fall. It’s all of those things and more. It’s all happening in varying degrees at varying times in the delivery.
This is why I also advocate for reverse progression methods when teaching this stuff. Now, I didn’t come up with that of course. Actually, I had my eyes opened over the last year to this approach. Of all people to do that, Paul Nyman exposed me to the concept. I then read some articles by learning researchers and finally “woke up”. Now, I’m using it with 6 kids I’m working with over the winter and am having success with it.
What I like is that they “get it” and that it is conducive to them developing that smoothness in putting it all together.