He does nearly the same thing with the driver swing though
Watch that video and you can see he basically makes the same swing, snaps his left leg and his hips work really left. You also get a pretty good look at his finish swivel, or anit-swivel. It really shows how he cocks his left arm up and keeps his arms closer together
If you got his hips to go LESS left, he would lose some of that lag, he would have to. His impact interval would have to start sooner and that big lag look would be reduced....A LOT.