I spent the better part of thirty years studying, teaching, and professionally performing in the magical theatre arts.
Edwards for those who might be unaware is not a mentalist, such as Kreskin. Mentalism is a version of magic which uses a magician's stock and trade secrets to another end....that of reading the mind. Edwards, like the article's author rightfully expresses utilizes a numbers/percentage game in accumulating hits. He is in fact, a well dressed fortune teller from the boardwalk, sans the crystal ball.
Cold readings are his stock and trade. It takes some one of intelligence and quick mental reactions.to carry it off. He relies on the implied acquiesence of the subject in order to be succesful. As soon as resistance is met, he moves on to another subject. His idea of performing in front of a large audience(while not new) allows him more opportunities and a lesser risk of failure.
Some twenty years ago, I predicted the five front page headlines of the Asbury Park Press (a broadsheet daily newspaper in NJ). It was seen in front of a live crowd and broadcast over WADB FM radio. The prediction was made four weeks prior, sealed in an envelope, into a zippered wallet, then locked in a jeweler's display case and placed in a store window, on view 24 hours a day. I got five out of five.
How did I do it? The same way John Edwards does.....Showmanship.