I didn't say the music was more dramatic. I said the change of styles and sub-genres in that short space of time was more dramatic.
I'd VERY much doubt that. People knew at the time of the rapid change of styles in that time. They were highly self-aware of the changes they were affecting...
Along those lines, consider this journey
In 1967, we had the Summer of Love, Monterey, hippies and Sergeant Pepper. In 1976, we had punk, disco and the first 12" single. And in that time, we had anti-Vietnam songs, Woodstock, the death of Morrison, Hendrix and Joplin, glam rock, prog rock...