Sean Ross had an interesting column about Urban radio in the PPM age. One thing he mentioned is that recently Urban stations have become more adult, to the point where they are on the border of being Urban AC. Urbans are playing more adult appeal R&B and less hip hop.
K104 generally plays the national Urban hits. So if the format has become more Urban AC and K104 is in the mainstream of the format, their music might be boring to the younger end of the audience.
In most markets this is not a major issue, the younger hip hop fans have no other radio station to listen to and will by default listen to the mainstream Urban (although some will give up on radio alltogether and get hip hop through alternative sources).
In Dallas, unlike 90%+ of other markets, there is an Urban (KBFB) that does play a lot of hip hop and does target the younger audience. This presents a challenge to K104. They can either follow the national adult music trend, have better quality demos, but lose the overall 12+ beauty contest. Or they can shift their music younger, become more focused on hip hop and shift younger to try to regain #1 urban and #1 12+. Judging from their playlist, they have shifted a little younger in recent weeks.
This will certainly be one of the nations most interesting Urban radio battles.