I have heard several noted instructors say the early wrist break (early wrist cock) on the backswing is not good because it shortens the radius of the swing. They advocate a late wrist cock on the backswing. However, I do not understand why an early wrist break should adversely affect the radius of the swing because the left arm (for righties) provides the radius and a straight left arm is the same length whether an early or late wrist break is employed. I would be very interested in your thoughts on this topic.