Here's some trivia, maybe someone has the answer.
Always vaguely wondered what the 1960's Jack Benny "beginning" represented:
Cartoon portraits of various men, women, children, fill the screen, the famous Bouche portrait of Jack, back to the various cartoon stills, they gradually "black out" as the screen goes to black. Cute, but I still never "got it".
Did the cartoon portraits represent Jack's audience? That is all I can come up with. Seems that any cross section of the viewing public liked Jack.
The 1950's "beginning" was much shorter: only a shot of a violin, or the Bouche portrait, with "The Jack Benny Program" title: Don Wilson announcing the title, of course.
Seems like most early television "openings" were relatively brief: Lucy, Andy Griffith, Walt Disney, My Three Sons, Dragnet, Bonanza, My Favorite Martian, Star Trek, Adam-12...wow, the memories are coming!
Guess the producers were on to something, brief really is memorable!