Out with the new, in with the old!
Oh, I totally agree! I adore Mary Martin as Peter Pan...When I saw this as a kid, I thought that Mary Martin was a boy - a very unusual looking boy. ;-)
I think my mom probably told me it was a girl playing a boy part before I ever watched it, but I don't really remember :) I also knew that she was the real-life mom of the guy that was on I Dream of Jeanie