It's the fluidity of Wonderboys right kick
Normally you would 1-2-...RHK. There's a pause when you're going from striking to kicks, you all know it, you see it. Not with Wonderboy, he's used that right leg so much it's like
1-2-3, it's like he's about sneak in a third shot combo cuz his right kick is so smooth.
Look ususally it's
1 (half beat) 2 (half beat) (full beat) RHK
cause obviously we don't transition well from a stable stance/posture to suddenly balancing on 1 foot while lauching off with the other.
Even when Wonderboy launches his right kick, it's not "faster" than other kicks, he's just so fluid in his transitions.
wanna see a difference? Wonderboys spinning back kick is normal/slow, then just look at how he lauches with his right leg, either high or mid, and you'll see he's like a beat ahead what is standard.
Wonderboy was controlling the ring and the pace, Big Rig just couldn't set up anything. (timing wise)