[Burner]

I always thought that to be so but "impact interval" is actually so brief as to make the effect of club face manipulation through impact negligible.

Consider also Homer's assertion that we should sustain the line of compression, being a straight line drawn through the ball from impact point.

Now, the path of the club head allied to the orientation of the club face is a different matter. This, I think, more closely replicates the hinge motions that Homer bequeathed to us than any influence we can assert on the ball during impact interval.

So, cut or draw spin is, imho, imparted upon on the ball more by a glancing blow whilst delivering thrust straight through the line of compression than any change in orientation of the club face during the impact interval and is the sole reason for any curvature of the ball in flight.