The broadcasts are normally during the morning and afternoon drives. I think that's why it works, they're trapped in their cars and frustrated. I don't think Rush Limbaugh would have ever gotten to first base if he hadn't come along about the same time it was popular to have a car phone--when cell phones came along it just made it that much better.

                So those are the ingrediants 1. commute 2. car phones 3. end of the "Fairness Doctrine."

                Somebody listening to the radio at work wouldn't have an impact unless they could call in, so they might as well listen to NPR. Besides, how many jobs are there where you can listen to the radio at work?