>>10960667No? Its spans well into late for many 20s and maybe some into early 30s.
It really depends on your race, or rather how fast you mature as you were growing up. Were you able to keep up with your peers? Then you're probably mentally capped at the standard 23. If you were slower at start but were ahead later on, you get the later end of the stick where you mature into late 20s/early 30s. If you were slow before and slow today, then you've already peaked.
>slowI don't mean how fast or fluid you talk, but how much your brain can absorb new concepts/information to expand upon your understanding.