My own experience:
I have to say I have hardly ever heard anyone I know say they like Adam. Most people I know have never even heard of him, or if they have, they think he's a poseur or they hate his music. I myself never listened to Top 40 until I started watching AI, and nobody I know over age 17 does. I hear people talk about Lady Gaga, but not Adam.
I don't know who buys Adam's album (but I suspect his fans have all bought at least 3 apiece), so the people I know are only aware of what they hear on the radio, and to them Kris and Adam are radio successes (on HAC). (If they even know who Kris and Adam are. AI is not as popular as it used to be.)
By the way, I heard LLWD 3 times today! I heard it on Seacrest, then a little bit later turned the station and it was on 104.1. Then later I heard it again on one of these stations.