I need to se Hogan do that in motion. There's something about the rhythm in Sergeo's stroke that I didn't notice before... But I guess you almost have to have done something similar yourself to really feel whether what you see is good or not. In any case, I can't recall having seen something similar in Hogan.
If you take a look at Dustin Johnson through impact - I'd say that looks like a close to perfect application of lag pressure. His shoulder turn seem to work in rhythm with the hands and the release of the club. What I saw in Sergeo made me unsecure whether the same was the case there...