Here comes the science:
A) KRLD 1080 has become a former shadow of itself in the 80's and 90's, Since Gavin Spittle took the reigns of the station a few years ago, the quality in reporting and anchors has dropped. When you lose one of your best people to NPR, you know you have issues.
B)KLIF is a Fox News Affiliate with mostly syndicated talk all day, they attemped live and local in the early 00's but post 9/11 they have been two things: Cheap and Easy in the bad sense. They got rid of their local news staff and brought in the feed to do all the work.
c)WBAP has become the worst of all, as they program all right wing, all the time after 9a until 12m. Thet only have about 20 hours of daily news block a week. Its become more about the politics and not enough about the news.