Please explain why Els' swing is Zero Shift. I drew a line from ball the right shoulder at Top of backswing (Turned Shoulder Plane). Els doesn't look like he sets up to that Turned Shoulder Plane Line at setup. Instead, it looks like the Elbow Plane. Therefore, he must have Shifted there during the backswing. However, he does stay on the same plane on the downswing- hence Single Shift. I may well have got this all wrong! Enlighten me!
I agree, anything I have seen of Els lately is single shift.