Life went on ...
So now I wonder: is it possible that they all thought that they were average because they were all the same?
(Please forgive any mistakes, I am not a native English speaker)
Yes - 100%
Until we had our DD tested I honestly thought that she was NT. I have posted this before but I was always puzzled by the way that our daughter could do puzzles and assemble toys nominally for child many years older. I assumed that the manufacturers did this to make parents feel that their kids were smart.