I really enjoyed that, too. Gave me a real insight--and new level of appreciation for what they accomplished, how hard they worked--and how truly technically skillful PTA has become (in addition to his already all-to-apparent skill with writing and directing actors).
[edit] It will be very interesting to see if he sticks with this model--or returns to having a conventional DP. There are clearly advantages and disadvantages to this "do-it-yourself" method.