By "younger demo", do you really mean 6-17YO children? Newsflash: that demo doesn't listen to radio anymore. Unless, they're in Mom's minivan on the way to school.In this case it's true, and when a niche demo is being served, but sometimes an overall number can indicate how the general population receives a station. For example, the alternative stations can serve the younger demo quite well, but they must have abyamal numbers for the older crowd to get something like a 2.3 in the 6+
One example of market size doesn't fit all. You can't say that a 2.3 6+ in a market like Miami, is equivalent to a market like Kansas City, because of the total number of stations within the market, demographic makeup of the market, and ethnic makeup of the market. That's why stations and ad agencies rely on breaking down the numbers into categories.
As we've all tried to explain multiple times: "Format flipping" is the LAST thing a station wants to do. It's expensive. REALLY expensive. That, and doing so based on 6+ ratings, would be colossally stupid.So the trend is low 6+, format flip. Some can indicate no audience is being served