It is, although I found this
"People who aren't familiar with Derren Brown or other expert human-persuaders sometimes think this must have been very difficult for Yudkowsky to do or that there must have been some sort of special trick involved,"
amusing, as Derren Brown is a magician. When Derren Brown accomplishes a feat of amazing human psychology, he is usually just cleverly disguising a magic trick.
No, Derren Brown is a mentalist. He is either capable of psychologically manipulating people, or he's a fraud. For instance, there's a video of him doing an apparent cold reading on a woman, and the woman agrees that he's right. One explanation presented on LW was that he actually made a bunch of obviously true statements, and swapped out the audio to make it seem like the woman was agreeing with a non-trivial cold reading. Swapping out audio is not a "magic trick", it's just plain fraud.
Todays xkcd
I guess there'll be a fair bit of traffic coming from people looking it up?