I was also born in 1960 and never considered myself to be a boomer.
My husband is a different story......he was born in 1955 and that 5 years is a major generational difference between us.
My one sister is 6 years older then me and you're right about the generational difference ... it's like I lived in 2 different families
I do get a kick out of teasing my oldest brother .. I tend to remind him that when he was graduating from High School .. I was just starting 1st grade .. LOL