@DigitalKitten5@Hitchslap1@ifindmidwits That population wide distribution assumes a random sample, it doesn't hold if your social circle is concentrated in fields that select for high cognitive ability.
@Devlinside123@happy_sort@charlesmurray Why would you expect six months of training to permanently raise the brain's baseline? Even then, it would probably be much quicker to reach that level again than before.