Good point Kriston, sounds like good advice to me.
I was wondering what they mean by 'not creating significant relationships' with other kids. If they're talking about choosing friends, from what I've read that's more of a 5+ age thing.
One quick list I found, it does mention at 4 'prefers kids to adults' for play, which I think is more the question for you, right. (And it does mention choosing friends at age 5, not age 4, or 3 for that matter, he just turned 4...)
http://www.uic.edu/classes/sped/sped506/milestones.htmlMaybe part of what is going on is an unconscious aging-up of your child, based on how he talks and his knowledge, adults around him might be expecting older level social skills.
