I got to see Alice in his prime, circa 1971. He was the middle act at the Spectrum in Philly between Humble Pie and Black Sabbath. I remember he had this giant lighted electric chair on the stage. Those were the days!
Sounds about right for me, too. The band playing before Alice was a trio of unknowns. Two guys w/beards and a heck of a sound, by the name of ZZ Top. I hear later they made it big. : )