[Daryl]

The Picture below (supplied from Buckets unlimited archive) shows the clubhead slightly overtaking his hands after Impact. But this I believe to be acceptable when a solid Hinge Action is used because of the speed of the clubhead. Anyone would need a continuous swivel to stay in perfect Rhythm as far as it concerns the "endless belt" Pulley. So, I would call this a perfect Horizontal Hinge.

Undoubtedly, BH was and remains the best of the best. The Heart of the Golfing Machine is to control and sustain the line of compression. It matters less how it was achieved. That it was achieved, made him into the greatest golfer who ever played.