Talent, it´s back! https://www.msu.edu/~ema/HambrickEtAl13.pdf
"The second myth is that it requires at least ten years, or 10,000 hours,
of deliberate practice to reach an elite level of performance..... But the data indicate that there is an enormous amount of variability in deliberate practice—even in elite performers.
One player in Gobet and Campitelli's (2007) chess sample took 26 years of serious involvement in chess to reach a master level, while another player took less than 2 years to reach this level."
Q: "How long will it take me to get a black belt?"
A: "Can't tell you."
...and we're right back at the beginning.