Fun read but nothing "inconceivable." The commentary on the DVD if memory serves is full of fun facts about the movie.
Commentaries should always be like that. I was watching some movie recently, don't remember which but this is common, where the commentary starts out witty and informative and within a couple of minutes the person got so involved in the movie that she just stopped talking. Went like ten minutes without saying a word.
Last night I watched "The Philadelphia Story" with Hepburn, Grant & Stewart and the commentary was all scripted out, minute by minute minutiae about the film and actors and production process, one of the best commentaries I've ever seen. Almost like Pop Up Videos.