Agree. The required abilities multiply rather than add so the right tail extends much further than a normal distribution. The gap between median and top performers is extremely large.
Please read that the right way. Deliberate practice compounds exponentially. Those extra hours refactoring, contributing to OSS, or mastering systems design create 10x impact through learned architectural intuition that median devs never develop. Your new skills will go a long way.
The 10x programmer is based on research cited in the Mythical Man Month, and there the most productive programmer was 10 times more productive than the least productive, as far as time taken to complete a coding task. The most productive were ~3x faster than the mean/median programmer.