Couple of points.
iPods do seem to be getting into radio's pants with the younger listeners to a degree. OTOH, web stream listening to stations has exploded, and is still growing. Lastly, the people meters in the markets rolled out so far indicate that station cumes are much, much larger than the diary system ever showed, although time spent listening is a lot less, and people change channels more than the diary showed (but no suprise to anyone with kids or who has ever been in a car around non-radio people!)
iPods do seem to be getting into radio's pants with the younger listeners to a degree. OTOH, web stream listening to stations has exploded, and is still growing. Lastly, the people meters in the markets rolled out so far indicate that station cumes are much, much larger than the diary system ever showed, although time spent listening is a lot less, and people change channels more than the diary showed (but no suprise to anyone with kids or who has ever been in a car around non-radio people!)