I read that too, and immediately thought about all the conversation we've heard about BEST/NTS being adapted to the individual - here and elsewhere. Hard to know what to make of it though.
Depends on the coach( NTS level 4). I shoot with a woman who shot collegiate back in the Pleistocene and our coach would in no way mess that THAT as my compadre is a bearcat to beat (although I do it from time to time).
As a general ruleour coach doesn't advocate the away from the face pull in thing. If you're doing it right at "set up" and "draw to load" your string hand would be mostly right there to come up under the chin to anchor.
Or something like that.
There is something about this candy cane thing that can result in a scrunched up bow shoulder. Perhaps it is the exaggerated "do this, do that, turn around jump down" etc gyrations. In other words the "opening the bow", set up if not done "correctly" has the bow shoulder popping up. Yet one more thing to fix.
My draw length increased as well but it had SQUAT to do with. It had to do with understanding the muscles used for an efficient draw.
Had to do with practice, and working out with a stretch band and, kettle bell and TRX and strengthening the appropriate muscles groups to do this thing and get better.
Any method where you understand what is the most efficient use of yourself will work. It's not limited to NTS. That's not a "silver bullet".