I have another DH in denial over here! I've showed him that book, too. He has accepted she seems to be somewhat ahead. What it really took was going to some play group type events with me. I think we hang out with some pretty smart / educated parents... and that they probably have very bright babies... but he finally saw what other babies her age act like.
Your comment about going to some play group type events to drive home the difference is a good one. It reminded me of our son's preschool Winter stage production. DS was front and center dancing and singing with no problem. A couple of others were keeping up, but the majority were just standing there looking like deer in the headlights. My husband leaned over and whispered the school should project the lyrics on a screen for the kids. I just laughed out loud and whispered back, "Hon, most preschoolers don't read yet!"
You should have seen his face when he realized his blunder! (Chagrin)
