Cubes have probably advanced quite a bit, and the advent of social media now means that the kids just copy each others tricks within minutes these days. My kid and his cubing friends went down towards a 10s average between the age 10 and 12, so in about two years of active cubing. But having the head of a 12yo kid (and amount of spare time) is almost cheating. You can learn anything in 2 years. I'm sure they could have learned Mandarin instead in that time. But I'll take it over being really good at Fortnite which was the other option.

It's boggling to me that 10-12 year olds are doing 10s averages. That's so cool. For many years it was a dream of mine to get sub20. Never got there.

The world record average is 4.48s and it's held by... a 9 year old.

Yeah, this is the sort of thing I would assume can only be really mastered as children, like a lot of sports, and falls off after 21.

Always fun seeing kids at competitions doing these insanely fast solves with their tiny hands.