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the "what" it is, is it's a radio format. (I know that sentence wasn't structured very well, but it's early and I'm not into the grammar thing right at this moment.) That is actually spelled out rather clearly in the article - that Infinity radio stations (Infinity is a major radio company, like Clear Channel) that used to carry Howard Stern have now adopted this format. In case you haven't noticed, many if not most commercial radio stations, the ones owned by these ginormous corporations, have adopted these soullessly automated music formats "spun" by a "DJ" who is actually some corporate stooge doing the same empty between-song patter for stations all over the country. "Local" is fast becoming an extinct species in the radio world.
This format sounds like utter crap, but I don't listen to commercial radio anyway so what do I know.