[hkmurakami]

To a first order, it's about how much time you invest into each skill. For me, a non Latin language didn't have noticeable spillover effects into English until much later in my life when I developed decently advanced linguistic proficiency in both languages.

This isn't to say I didn't do well in school -- I was at the top of my class in high school and went to the top ranked university in the country. Still, had I invested more time trading and writing English material during my childhood and adolescence, those skills would have developed much earlier.

And I agree with you about sports. I'm an advanced or white level athlete in 4 or 5 sorts, and it's very easy for me to become producer at a new sport, and I often notice body control, posture, focus, or valance related carryovers.