Post-secret Hogan had the most efficient motion ever seen. Leading with the rear elbow is biokinetically the most efficient method of achieving the EEP (because it subdues the elbow joint to the body rotation as quick as possible without taking away the inertial power of both forearms). But the elbow does not continue to move forward to the front of the body while extending the arm and stalling the body rotation. Using TGM terms, it reminds pitch elbow procedure transforming into punch elbow position in the second part of the downswing.
What stalls is the joint exactly when the elbow plane is being achieved (very early) and put his rear forearm in line with lagged shaft. The stall (maybe is not the best word to describe the lack of further movement of the rear elbow joint but I cannot think about any better) is crucial. No independent arm motion in relation to the body rotation from that point. Perfect biokinetics. Imagine rear humerus being "tied" with the main body while the forearm supports the shaft. Nothing can be spoilt here.
Other mortals, who are not able to drive the rear elbow in so much a forward position so early simply are forced to move it somehow constantly and, therefore, are not blessed with such great body-arm-shaft synchro relationship. Nevertheless, it is still possible as we can see in Furyk's motion that everything happens also from the core out.
When we look through this prism to Hogan's teachings we will easily see how the above described concept is in line with his famous performance in Ed Sullivan's show. He wanted people to imagine that humera bones are glued to the sides of his main body up to elbow joints so that the only parts sticking out are forearms !
What is even more interesting, when Ben Hogan decided to reveal his secret to Ken Venturi (as we can learn from the BH Collection DVDs), he showed a similar thing, namely, rear arm's elbow pocket up at the middle of the downswing to lead arm's elbow pocket up in the follow through phase. One can achieve this goal practically only with both humera bones attached to the sides of main body - just as shown in his book: