His grip and foot placement appear subserviant to such a highly developed pendulum.
He's got a great relaxed rhythm getting to the top, gives it some momentum at the transition and lets his arms swing in a relaxed manner, letting the club freely release. He's got a nice plane - the club in relation to his wrists and arms is very good. He's the epitome of someone who develops a swing to get impact results. The difference between the average tinkerer and him is that he appears to understand and can visualize the essence of a swinging motion.
Distance control? - I'm sure he has 13 clubs in his bag other than the putter. Specialty shots? - I'd bet that he can adeptly smack a ball resting atop a gopher's head.