[BerntR]

COAM isn't relevant here. COAM sounds cool since it is about angles and momentum, but it doesn't really explain anything related to the golf stroke. If COAM were relevant to the golf stroke, it would mean that the clubhead slowed down as it was released. That's what happens when a moon sails away from it's planet and in other coam systems....

Conservation of energy - and to be more specific - velocity energy - is what you need to look at here.

The trowout and the centrifugal power - as dull as it may seem - doesn't produce any speed in isolation. The release causes a redistribution of velocity energy in the club. This makes the club head move a little faster and the handle move a little slower. The heavier the shaft is the more there will be to redistribute. But I believe this is a minor.

If the hands produced zero resistance against slowdown during release the club as a whole would not pick up any speed. The important thing is the heavy feel you (hopefully) feel when you make a really good release. This is the feel of you thrusting the club really hard. Pushing and pulling with linear forces per TGM, tangential forces per Sir Isac Newton. In 5th gear. It's the effort during the release interval that produces the speed -whether it's active as in thrusting with the right hand or more "passive" as in just keep the pivot going and thrusting with PP¤4. All the release does is give your pivot and hands super leverage. Not that there's anything wrong with that.