When someone says new, I think brand new. For example, these are my new shoes. I bought them yesterday. They will be known as my new shoes until a) I buy a new "new" pair of shoes or b) they lose their luster and "new" appeal (approximately two-three wears). I'm not sure how the definition of new works on radio, but I think the radio stations have a way different definition of new than I do. As a radio station, "new" must be any song that has been released within the past 274 days (just a guess).
If we think about it, if my shoes get "not new" after two or three wears, songs would get "not new" at the same rate. I listen to the radio about an hour a day while driving to and from work. Each song is around three minutes, but there are probably twenty minutes of commercials/talking an hour. So in a typical day of radio listening, I hear about 13 songs. Thats hopefully an exclusive set of songs, but knowing radio, most likely I've heard many repeats.
I'm sure you know that radio stations have their choice songs that they play basically every other song. Summer of 2005 it was Brad Paisley's The World. I can't listen to that song to this day. Anyways, with all my calculations and magical equations, a song will get "not new" for me in about a week.
If my new songs get not new in one week, and radio stations think songs can be new for a year, we have a major misunderstanding. Point of the story is, I need to not get my hopes up when the radio station announces a new song.
And don't even get me started on new releases at Blockbuster...