During the original piece, host Ira Glass gives the impression that they were originally sceptical, saying that they "actually spent a few weeks checking everything that he says in his show." So I guess they need to check a bit harder next time...
Full quote: "When I saw Mike Daisey perform this story on stage, when I left the theater I had a lot of questions. I mean, he's not a reporter, and I wondered, did he get it right? And so we've actually spent a few weeks checking everything that he says in his show."
From http://www.thisamericanlife.org/radio-archives/episode/454/t... or http://webcache.googleusercontent.com/search?q=cache:www.thi...