wmxj has been under performing for years, maybe you have to be there but i would think that miami would have alot of older demos & retirees and SHOULD DO BETTER, unless its a myth that folks retire to florida.
The idea that Miami/Dade is packed with retirees is a myth. Broward, while certainly having retirement communities, is not that densely packed with retirees either. The fact is that the Miami metro is too expensive for most retirees. And the market is over 50% Hispanic... not the environment a lot of retirees seek.
Because of the high percentage of Hispanics... and the fact that Hispanics over 55 are nearly 70% Spanish dominant... makes for a more limited market for any kind of oldies and classic hits format.
Keep in mind, too, that stations can't monetize audiences over age 55 in markets like Miami.