I'm not a radio pro, but I tend to have a set of stations with the formats I like and tend to go to those stations, and keep up with format changes in the area. On the other hand yesterday I was telling my wife that WASL in Dyersburg, TN had changed to the Jack format and she said that it really didn't matter to her, and that she tuned the radio looking for a song she liked and would stop there regardless of the format. All she generally knows is rock, oldies, country, Christian, etc. Then when they go to either a song she doesn't like, talk, or advertising, she changes stations. I think that pretty well fits the way a lot of people look at formats. They may know the general format, but not the precise format names, like AC, CHR, etc.