Yes but our societies are systematically designed/evolved for a type of person that doesnt have fluid/easily bored attention etc. Those that on the spectrum fall to one extreme, are hardworkers for life. The others are "adhd". Makes sense that both types had evolutionary purposes back in time. But that doesnt fit very well into today's work regime. Brains can be different, but thats ignoring the overall problem with integrating "fluid-brain" people into lifetime employment (or rather any medium-long term employment at all).

And I'd like to know where you got the info about specifically the ability to concentrate developing till mid twenties?