[EdZ]

CLUBHEAD LAG... THE STRESS ON THE CLUBSHAFT IS MAINTAINED INTO SEPARATION OF THE BALL FROM THE CLUBHEAD, OR EVEN SUSTAINED BEYOND SEPARATION. Tis is usually sensed or felt by the player through the FIRST JOINT OF THE RIGHT INDEX FINGER(#3 Pressure Point).
I believe this is the most important Type of LAG.

#2 ACCUMULATOR LAG... RETAINING THE LEFT WRIST COCK ANGLE well into the Release stage of the Stroke(8-9). This can be sen in many tour players.

Some of the tour players are True Centrifugal Force Swingers. They may employ Double Wrist Cocks per 10-18-B. This may give them even more #2 Accumulator angle. This can actually be an advantage for this type of Swinger, because the "reverse rotation during Release-- retiurn to Flat and Vertical Left Wrist-- inhibits Clubhead Throwaway."

PIVOT LAG... THIS TYPE INVOLVES THE PROPER SEQUENCING OF THE PIVOT COMPONENTS. "Pivot Lag is Body Power for Swingers(2-M-4), launching pad for Hitters(2-M-3), and for both, operates like a "gear train" to extend the Swing Radius of the Primary Lever to any point from the Shoulder Turn on down to the Feet(Zone#1)."

It is MAINTAINING LAG PRESSURE that is the key. You can appear to maintain clubhead lag, and pivot lag and still give up lag pressure.

Lag pressure IS the 'heavy' feeling.

Lag pressure IS leverage.

Lag pressure IS "supporting the swinging on plane force"

This is why PP#3 is so important, it is the key to knowing that you have lag pressure. To feeling the 'loaded' club at transition, and the 'drag' feel of proper downward, hands leading impact.

Lag pressure is the key to compression.

You will know when you have it, you will 'hear' your shots sizzle, and impact will sound like a gun being fired.