[Daryl]

Replace the inclination to hold off with a smooth consistent rate of acceleration and the club stays lagging the power package, past impact all the way to Both Arms Straight. This way impact would be executed as Hinge Action as opposed to Swivel.®

OB,
Elegantly stated. Regardless of how it's explained in TGM, that's the single best answer. Our primary focus at this point in the Swing, is Hinging the Primary Lever.


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Other reasons that the Left Arm should not be stuck to the Torso are:

6-B-4-0 THE FORTH POWER ACCUMULATOR The angle formed by the Left Arm and Left Shoulder forms the Forth Power Accumulator. It is not only an independent Power Accumulator, but its Triggering function as the Checkrein of the Right Elbow is also vastly important and it thus can be the Accumulator of the Accumulators – or Master Accumulator. Also see 2-M-4.

As Accumulator #4 it is Pivot (Body) Power supplying the initial acceleration of the Downstroke to throw the Lever Assemblies toward Impact by the Thrust of the Shoulder Turn. See 7-13. Another major contribution to Impact Power is geometric – it is the first link in the Swing Radius power train between the Club and the Feet.

“Left Arm Power” in any form or amount can still be considered #4 Accumulator Action. Otherwise it actually substitutes for the Pivot to introduce the circular motion required to produce Centrifugal Force.

1. In other words, if the Left Arm Doesn't move, then the Right Elbow Doesn't move.

And......

6-A-2 THE PRIMARY LEVER ASSEMBLY An additional structural feature is leverage. A dual system of Form III levers. A Form III lever has the Force – or Power – between the Weight and the Fulcrum (2-L).

Consider the Left Arm and the Clubshaft together as the Primary Lever Assembly. The Left Shoulder is the Fulcrum, the Secondary Lever Assembly – Cocked or not is the weight. This assembly is normally propelled by the Arms. That is, Accumulators and Pressure Points #1 and/or #4 as discussed under 6-B-1 and 6-B-4. Movement of this Assembly must comply with 1-L-7 to -11 and 2-F.

1_L
7. The Lever Assembly is driven by exerting pressure against it.
8. No proportion of the Lever Assembly can swing forward independently.
9. Regardless of how the Lever Assembly is driven, it moves in a circle.
10. The Lever Assembly must be driven through Impact by an On Plane force (moving toward the Plane Line).
11. Clubhead Force and Motion is On Plane at right angles to the Longitudinal Center of Gravity and varies with Speed, Mass and Swing Radius.

2. The Clubshaft, which is part of the Primary Lever, will swing Forward independently if the Upper Arm is held against the Torso.

My Final Point. You can't have a Wrist Throw to Trigger a Sequenced Release unless the Left Arm can Move off of the Chest.