We'll have to wait and see if the "Jack" format trend is long-term or a short-lived fad. Depends on how many people feel it is a plus having a DJ host a radio show, telling listeners a little about the music, and perhaps adding a little humor. It of course has been very successful in the past in virtually every radio market. Or, maybe this new generation of listeners just want music so they can download it on their MP3 players. Over the next few months listeners will be voting with their ears.