Take a look at this kid. 14 y/o Sachin Dennis blows the field away in Jamaica and runs 10.66 - just .07 off the age group WR. Yes, I know age 14 athletics is normally about who hits puberty first but he looks legit. Dennis is the age 13 WR holder at 10.90 so he's progressing nicely.
https://www.youtube.com/watch?v=y6kVx-mnf6U
The age 14 WR holder is Hungary's Dominik Illovszky . He just turned 15 on January 4th.