Radio loyalty

Guys, do u think that there are still any people who stick to one radio station for more than 30 min without changing to another show on another station? The way I see it advertisers and radio station should take note of that, there was an article on this site about 2 weeks ago which was talking about the same issue.Gone are those whereby I used to listen to Fresh & Thato at Y from 06:45 in the morning til I got to work without changing the dial.