Why did Fox executives pass on their chance to scoop up Conan O'Brien? According to Fox head Kevin Relly, O'Brien's TBS debut will probably earn ratings with a "decimal on the left side of the number," and on Fox, "there would have been an enormous amount of pressure to see the decimal on the right side." Around the time that NBC started O'Brien's booting process, he was drawing less than a 2.0 rating in the key demo, but as THR notes, even a cable hit like The Daily Show can only manage a .8. Can Conan do better? [THR]