How do you distinguish in these pictures between an upper body sway off the ball and an hip slide/axis tilt under a stationary head?
IMO if you try to tilt your shoulders away (sway off the ball)it is impossible to obtain the lag you see in these pictures .You will be casting from the top.
Axis Tilt(increase in) is often associated with a shallowing of the plane on the downswing. We can see with Garcia, for example, that this is not always the case. He shallows the downswing as much or more than anybody, but has very little tilt in this picture.