Being a part of GenJones, much to my surprise, I think it has more to do with the constant focus on Baby Boomers as those born in the 1940s. A generation is twenty years, but the media and the culture pretty consistently ignored those born in the last half of the baby boom.
I'm not aware of any great coverage of the oldest boomers born from 1946 to 1949. I actually think that the group of people who's actions and influence has been most covered is the generation that entered the 1960s ranging from age 15 to age 35, the "silent generation" (1925 to 1945), they were the hippie movement, the music makers, and the young radicals, the media for some reason attributed all of that to their children and younger brothers and sisters called the boomers.
Start googling the celebrities and rock stars of the "hippie" generation and you will be surprised at who they really are, hint, they weren't the 10,12,20 year olds.
You will find that Hendrix, John McCain, Jane Fonda, Janis Joplin, Bob Dylan, William Ayers, Bernardine Dohrn, Joan Baez, Rod Stewart, Yoko Ono, Peter Paul & Mary, the Chicago Seven and almost everyone like them are from pre boomer generations.