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.
You can call it whatever you wanna call it . . . .BUT . . . . would you say that clubface is vertical to a horizontal plane . . . . hmmmmm?????