I'm not sure what group this is that David is talking to. I do know that while many of us will think it's a simple trick, but it's actually quite advanced. The group he's showing will NEVER be able to do it. Think if you didn't know card magic, you'd never remember what he actually taught. It would be a jumble in your mind.

http://www.youtube.com/watch?v=jI89cqfjYVo&feature=related

I think you can look at the expression on the lady in red and you will get a good indication of how many there will be able to recreate this. At least he didn't try to explain how to false shuffle. This one as presented gets pretty close to the "card trick that my uncle used to do" with all of the different procedures required.

Looking at their faces, I don't think the staff of Esquire are going to start exposing magic in their magazine. They were pretty puzzled.

Looked to me like they were disappointed in the pedestrian explanation. I think he just lowered himself a couple of notches in this audience's estimation.

Nice to see, I don't think there is fear of exposure or anything here, the thing I see as a problem is that since he does a lot of card material, it might lessen the thing he relies on in their minds in particular,

if he didn't use them so much it wouldn't be an issue

it still came off as genuinely impressive though, good to get in his head just a little bit to see how he can explain