In TGM terms this topic is probably best described as an element of PIVOT LAG.
Now... I worked with another fellow named David Lee that believes that there are a couple of ways this can be done(at least two). The first is called 2:1 timing-- Here the weight moves over and back, from right and back to the left foot, before the backswing is finished. With this type the lower body can now "whip-sling" the arms. He says Jack Nicklaus does it this way.
Another way is, I believe called 1:2 timing-- Here the weight moves to the right side, then back to the left, in a unified manner. With this type he believes the player has to add some manual power out of the arms to get much power. He says Tom Watson is an example of a player that does it this way.