IIRC, one tidbit broughr up in "The genius factory" was that while preschooling seems to result in accelerated development, any such differences are erased afte

IIRC, one tidbit broughr up in "The genius factory" was that while preschooling seems to result in accelerated development, any such differences are erased after a few years if school. The conclusion made in that book seemed to be that specialized teaching programmes don't provide long-term benefits, but maybe it's just that a one-size-fits-all schooling system will force more advanced kids to conform to a lower standard...