We were talking about this yesterday when a member's wife was having a hard time pumping because of working in an OR.
I was never on formula as a child...long line of midwives and hippie-chicks in my family.

However, I did start drinking regular cow's milk after I was a year old. (I think I was almost 2 when my mom weaned me.) So I had it in breakfast cereal and oatmeal.
I'm the only T1 in my family, that I know of. Everyone else on my dad's side is T2 though...