I am not convinced that just starting early is all there is to it. I started Math, Sports, and Piano at like 6 years old but there are still plenty of "10x <insert activity here>" people that figuratively and literally run circles around me. Talent is a real thing.
I did spend years on a specific sport starting as a kid. I was average. There were people that first played the sport as teenagers and within a year were competitive nationally.
I was in the same math classes as some of my peers for a decade+. Some people were great, some were bad and most were somewhere in between. The kids who were exceptional at 9 were exceptional at 17.
Obviously time matters but genetics play a huge role as well. I have a family friend with 2 adopted kids and 2 biological kids. The adopted ones are average but the biological ones are very smart. Just like their parents.
It's possible there are plenty of individuals 10x better than you while you are 10x better than most, due to early exposure. I wouldn't say this of sports and math necessarily, but I definitely would say it of your example of piano, language acquisition, and I would not be surprised if programming patterned with them, at least partially.
That may be true of individual activities, but you trained in multiple. A fairer comparison would require the same people who best you in athletics to at least be comparable at math etc.
