With the early backward break you do not get a bouncing effect at the top. From the time the hands are hip high only the arms, actuated by the shoulders, are moving the club. The club itself is not moving fast as it reaches the limit of the backswing, and there is a noticeable but not violent pull on the hands and wrists when it gets there.
Hence there is no rebound. The club starts down solely in response to the shoulder and hip actionand we are off to a late hit instead of an early one.
Since the late hit is the true manifestation of good timing, you have, right there, one reason the early backward break promotes good timing. The fact that there is no rebounding from the top, and no hurried effort then to get the club head to the ball, is also why this system makes it easier to establish a good, even rhythm.
But, you will say, the pros have no trouble with the late break and this rebounding of the club head. No, they don’t, because they subconsciously time their movements with it and also because they “tame” the club head by keeping a tight grip at the top. This grip is tight enough so that the club never gets away from them. But for the...