I agree. I started in an average class in my year. Don't remember doing anything extra at home, or much at all, but still had an equivalent of all A's. At some

I agree. I started in an average class in my year. Don't remember doing anything extra at home, or much at all, but still had an equivalent of all A's. At some point my parents realised something was wrong and moved me to the strongest class... Only then I started doing something. This is when I realised that some kids were already impossibly far ahead (we had world-level olympiad goers there). Can't say I become world-class at anything but this helped to concentrate and work through the rest of school and uni without any problems.