I spent several years working in the country scene in the late 80s/early 90s in S. Fla., heard the same thing back them, saw the numbers back then.
If you are looking for big shares with a country format, it won't happen.
If you are looking for an audience that brings loyal listening and shopping habits and will give consistent numbers over a period of time, then it's the format for you.
SS, DD applies here.
Kiss is like an appliance when it comes to Country and they generate numbers, just not huge shares of overall 12+.