I thought the Scarne performance was fine. It's not unusual for the basic parts of taking a wallet from that pocket to cause more fumbling than transferring the card, and from their own experience people don't expect that to happen seamlessly. Also, he had done nothing to tip it off as a suspicious gesture; the palm was pretty perfect. And the wallet's rubber band-incarcerated state sells the whole thing, as does flipping the wallet to the spectator. A YouTube "tutorial" should be one-tenth as good.
That said, anyone not intrigued by Richard's post above isn't getting full value from their time here. Just the fact that he can offhandedly recall possessing a piece of history like that is one of those hard-to-explain reasons that I actually like magic. Personally, I don't care a great deal about "entertaining" audiences or any of the other counterfeit reasons that I've passed off. But is there any other field where you can participate in a de facto conversation like this one, with people of similar stature?