Also ADHD runs in families, so similar ies between your son's attention and other family members is not relevant in terms of whether or not your son has ADHD. (They might all have ADHD!).

My dad (undiagnosed), myself, my sister and one of her children, one brother (undiagnosed), my son, my ex-husband, my best friend I've known since high school, my close Internet-friend and one of her children. ADHD is my normal so comparing my son to friends and family isn't meaningful!