[6bmike]

See 2-P where Mr. Kelley writes:

"The true Angular Speed (RPM) of the Clubhead is identical to that of the Hands due to the mandatory Flat Left Wrist."

The RPMs always remain constant- that is the rotation speed of the hands, arms, body and clubhead. But read further, full extension of the lever assembly will increase clubhead speed in the arc of approach as RPMs remain constent between hands and body. This increase in clubhead speed is why we use a two lever assembly. The core could not produce such speeds. Mechanical advantage at work.