#1 Car Ads
What has always annoyed me about drive-time radio is the apparent fact that the radio industry is supported entirely by automobile dealers. And they always have some guy or girl with an annoying voice screaming about the great new deals and how they’ll GIVE YOU TONS OF MONEY if you can find the car cheaper elsewhere and how ALL CREDIT APPLICATIONS ACCEPTED and other audio-spam stuff.
Two out of three ads on our local stations are for car dealers. This is only compounded during peak hours when the commercials begin to exceed even the excessive times spoken of by the OP.
#2 Bogus non-ads during “commercial free” time
We have a local station that goes on and on about how they have a 20 song “music marathon” every day at 9, noon, and 5pm. But after you suffer through ten minutes of car ads at 4:55, they finally start their music at 5:05, and then something strange happens: after the first or second song, you hear something that sounds pretty much like an ad. A fellow comes on and talks about how great their station is because they play 20 songs in a row without interruption.
Another song passes and then they have a spot for their current contests. And so on. “Back in the day” when a station said 20 in a row without commercials, you heard just that, 20 songs, followed by a kind DJ rattling off the song names and then a buttload of commercials. Then it would start again, all day long!
Of course, they are truthful: they state clearly that they don’t consider station promotional announcements to be commercials.