I've written before on one of my favorite films, "His Girl Friday," arguably the best film in the public domain.
For fun, I decided to see how badly the "one minute per page rule" fails for this film. The first four pages take approximately 2 minutes of film. It's fun to see the small changes here and there and the how Howard Hawkes followed the directions. Starting on page 5 there is a long divergence away from the script. Makes things interesting!