I once had two players come in for a fitting and both had the same swing speed with their 6 iron but player A hit it 180 and player B hit it 160. The only difference was that player A delivered a loaded, leaning shaft to the ball and player B's shaft had already released prior to impact and instead of delivering energy he had dissipated it. So the actual clubhead speed had very little to do with achieving max distance. The only way for a shaft to remain loaded and the wrists uncocking closer to the ball is by continued body rotation. Once rotation slows or stops, or if the arms move faster than the body, the wrists WILL release. It's simple physics, nothing can stop this from happening. At some point in the through swing the hips will stop rotating once the left knee straightens. There is a finite amount of hip rotation possible in the golf swing, it's limited by both of your feet on the ground. Ultimately, as the right foot comes of the ground and the right knee touches the left knee the hips will turn a bit farther. Then the rest of the body will continue to turn until it can't anymore. Almost all tour players, with very few exceptions, will finish with their chest facing left of the target(for right handed golfers). Most amateur's chests finish right of the target, one of the key differences in the swings. Sequencing the body and arms properly is the key to a fluid powerful swing. Just look at Cameron Champ. Does he look like he's swinging forcefully? No, but he creates a lot of speed because his sequencing is virtually perfect. Look at this video at 1:31 and see how his hands are at the ball before he begins releasing his wrist cock. And the shaft is still leaning slightly at and just beyond impact. Left leg is straight and hips have finally stopped rotating. You can't argue with video.
