The Left Shoulder is the Center of the Arm Swing (Zone #2). The Head (or, as may be preferered, the 'point between the shoulders') is the Center of the Body Pivot (Zone #1).
They are different.
Yep, I understand those points. I should have rephrased the title "Is the low point of the Golf Swing opposite the left arm socket...Always?". Questioning that blanket statement from the DVD was the sole reason I posted the thread.