From what I have read, over-reliance on milestones can attack the confidence/intuition of parents that Webbie posted about (and I agree with what she said.) Milestones are great but they do vary from child to child. I have read that more important than whether they sit or walk at a certain time is if they make eye contact, smile, are responsive to your emotions, etc.
I am getting irritated with the doctor too. I like your approach, Webbie. I think I automatically think I HAVE to go to appointments because my parents are physicians and I grew up with that mentality, but it often leaves me feeling the doctor doesn't know what she is talking about or is advocating a one-size-fits-all approach that may not suit my son.
Get used to me. Black, confident, cocky; my name, not yours; my religion, not yours; my goals, my own; get used to me. -Muhammad Ali