Hi Will...lower that "age 70" to age 62, to include my friend's brother, mentioned in a previous post!
Frank - Ms. Lew's dissertation research was fascinating. I wonder what made her decide to take on this particular subject. Did she ever tell you?
Many years ago, PBS did a TV series, "The Story of English" and also published a companion volume of the same title. The section on the settling of the west does not specifically address a San Francisco accent, but does cover a variety of unique words and phrases that eventually became part of the West Coast language.