In my opinion, this sort of ad-hoc stereotyping weakens the rest of the analysis. There are plenty of counterexamples.
Anand, a former world champion, became a GM at age 19 and is still ranked World No. 9 currently (at age 52). Ding Liren (Current No. 2) became a GM at 17. Grischuk (currently No. 17, peak No.3) became a GM at 17. All three have crossed 2800 ELO at some point.
I hope this is not the sort of analysis that chess.com has run in the other 71 pages of the report.
Anand, a former world champion, became a GM at age 19 and is still ranked World No. 9 currently (at age 52). Ding Liren (Current No. 2) became a GM at 17. Grischuk (currently No. 17, peak No.3) became a GM at 17. All three have crossed 2800 ELO at some point.
I hope this is not the sort of analysis that chess.com has run in the other 71 pages of the report.