I just saw this topic, and as a country listener in Los Angeles, thought I would chime in.
Of course, KZLA 93.9 was THE station for Los Angeles for years...then along came KIKF 94.3 in the nineties, so you had two country stations next to each other on the dial. You could switch between them, to see what was playing, avoid commercials, etc. I would guess that diminished ratings of both over the years, until KIKF bit the dust. When KZLA was flipped, country listeners I know were really upset. You couldn't hear a country music unless you were South of Downtown LA and might pick up KFRG out in the Inland Empire.
I made the switch the XM Radio, which I still have....But I listen to KKGO off and on.....they have changed the format in the past year, and it is more listenable.
Also, in the past couple years, there seems to be even more Spanish stations on FM. I bet some of the English language listeners that tired of the same continuous Rihanna, Adele, Beyonce, Bruno Mars playlists on AMP, KIIS, MYFM, etc might have shown up on KKGO.