How accurate is the author's description of your birth order?

The article " How your Birth Order Influences your Life Adjustment" by Lucile K. Forer talks about people's birth order could influences people's life. In each family, following the family members changed, children and adults will change their mind to adjust the lifestyle. And children in different position would have different relationship with parents. Also, different position will influences children's personality that become capable or dependently.   The author's description accurate of my birth order. The following is my reason.

He said "The older or oldest child's emphasis upon being 'parental' offers him both advantages and problems." I think my oldest brother is like that. He showed his power of oldest child. Then he leader me and my little brother to listening to him. If my parents are not there, we need to follow him. Otherwise, he protected us when we need him.

He said "The middle child comes to think of himself as sometimes better able to do things than other people because he is usually capable than his younger sibling or siblings." I'm the middle child. Sometimes I think about that I have able to help my little brother. Because he is smaller than me. I need to take care him. When I think about this, I would feel I'm independently. 

He said "The later children enjoy many advantage as a result of having more relaxed parents." Because parents had first child, they had experience about take care child. And each first time people pay more attention to doing things. The later child will be more free. I think my oldest brother is under stress. My parents is more strict with him. My little brother and me is more relaxed.  But I do not deny that is because we had done every thing well.