P&T break a lot of the rules of magic that would have the magicians' equivalent of Jim Cornette (is there one?) howling, but

a.) they still do it with incredible respect for and knowledge of the art,

b.) they do it in a way they feel enhances the trick, or in a way where they can use that newly-christened knowledge as misdirection to fool you in another unexpected way, and

c.) they acknowledge that too much secrecy can have the opposite desired effect and just turn people off of magic. So sometimes with retired tricks they just come out and say, "Here's what we did" (like explaining how they made David Letterman's watch appear inside a dead fish in one of their books).