It's not so much about the brute strength, for sure he has the grappling strength but I see it more as speed and how good he is at making you carry him while he is on top, even when Rob scrambled out for a brief moment, Khamzat just shot in straight away again, making Robs effort basically a waste, and u could see it on Robs face as well, like "ohh fuck". The fast tap was pretty well explained, forearm str8 into the teeth, it hurts like a bitch but at this level rarely something you tap that fast to, usually guys at this level are able to adjust out of it and turning their head.