What I notice was yes that big guy was fast and really fast for a big man, I also noticed that the thinner ukes fell like flies, but notice the shorter but stout uke. Who did not seemed fazed by all these fast moves and strikes, maybe he wasn't hitting as hard as it appears when the size is similar.
I also notice the slapping of his chest while striking seemed for dramatics, and I've always thought it could be another strike toward the opponent, like a 1-2.
On the + I like the open hand usage and various hand formations, and believe because the strikes are done with short motions they look fast, but lack the power of the strikes with more torque. I like the stomping and body torquing done to produce short range power. But wonder how much more power would be produced with more hip or driving from the floor. Shaolin looks a little like that but they drive more with their hips from what I observed.
Big, fast, old guy on doubt, impressive to say the least at 60 year old, I'd like to see his DL.