What’s the top-rated morning radio program in the U.S.? No, it’s not Howard Stern, and it’s not some right-wing blowhard shrieking into the microphone about the evils of Dan Rather. It’s NPR’s quarter-century-old bastion of straight news, Morning Edition, which racked up an average of 13.2 million listeners per week in the latest ratings book. That’s actually an increase in listenership from the previous year, despite the bad publicity the program received after NPR dismissed longtime host Bob Edwards last year.