My DH, "got it" the day we had a 5 & 6 yo old over for a play date with our DD, who was barely 5 at the time.
We assumed Battleship would be a fun easy game for Kindergarteners because our DD easily learned it at 4.
But after 30min of trying to teach DDs friends the concept, my husband gave up.
Later on he admitted that "maybe she is a little different after all."
LOL, when in doubt have a playdate with kids the same age or even a few years older. Works every time in noticing differences. It's interesting for us when DS5 helps one of his friends that is 5 years older with his math. And when he was 3 and would take out scrabble or battleship during a playdate...that's kind of obvious : ) Glad your DH noticed the differences.
I have to say that I was really happy when our DS5's principal said that DS has special needs based on his "exceptionalities" and that IEP's are typically designed to meet the other end of the spectrum, but that they should be able to help on both ends of extremes. I was in complete shock that she gets it. I realize that they are completely different needs, but nevertheless there are clear needs for differentiation on both ends...especially the further away you get from the middle.