This is definitely not typical behavior - spend some time at a preschool or daycare.
A wonderful book for this stage is Ruf's '5 levels of giftedness' it will help you sharpen your observation for milestones.
It's very usual for one parent to be more 'alarmed' by the unusualness of a child's behavior than the other - very often the Dads will be the one to say 'It's all in your head.' I'll need to find a way to nurture the good parts of your husband's attitude, while winning him over to your side - this is a long slow process. I was one of those females who expected my very intelligent husband and our very excellent local schools to know what was 'best' - but it turned out that I actually new best soonest. That was a hard journey.
Keep posting, keep us posted. Best Wishes,
Grinity
