Unfortunately I can't show you proof, we were too poor to own a video camera back then
He was better than me, and that is saying something. I didn't start playing til I was 4 though when my best friend got a Sega. I guess it was just a combination of being exposed at a young age, having someone to teach him (me), and being a generally intelligent and fast developing kid.
Even if he was some sort of genius baby and his mind could process what was happening fast enough his body would not be able to respond fast enough. You are misremembering. It is literally impossible.