The survey was good, but I think you should have just grouped the Nederlanders, Shuberts, and Jujamcyn as "commercial theatre." Unlike all of the non profit companies, these people (usually) just own the theatres but they do not produce shows or pick a season to go into their houses. (Not to mention the times that the non profits, especially Lincoln Center, rent a commercial house because they have a long running show in their Broadway house but need to continue their season. Since Broadway theatre owners are not responsible for bringing in audiences, the producers are, the survey seems to be comparing apples and oranges some of the time.
Whatever happened to class?