It’s a memorable phrase and it certainly has the ring of Madison Avenue. Interesting sidelight on this page tracing the origin of Madison Avenue as a synonym for advertising.
According to Roland Marchand’s book, Advertising the American Dream, the phrase ‘Madison Avenue’ was first used to denote advertising around 1923, and by the late 1920s, it was both a prevalent and geographically accurate term. It is worth noting that the George Batten Company moved to 383 Madison Avenue at 46th Street in early 1923, long before the 1928 merger that formed BBDO, and the agency remained there until 1987.
I’d like to see a cite for that (OED’s earliest is 1944.)
12 Angry Men is an incredible film. The cast just knocks it out of the park, especially Fonda and Lee J. Cobb.