I see examples of that pretty much everywhere. People that regularly do and practice something get to be better than the vast majority of people, so talent and

I see examples of that pretty much everywhere. People that regularly do and practice something get to be better than the vast majority of people, so talent and intelligence end up playing a lesser role. This is true for physical skills and also mental. The author said he ended up in the 95th percentile -- I doubt this is achievable for all people, but "high" yes (whatever the interpretation of high is).