The only way this station is going to get any legs out of this publicity stunt is if they really PROMOTE it. TV ads, billboards, sponsoring and showing up at BIG events. And I doubt Entercom will do that. Like most big companies, they change the format and hope people listen to it. Instant gratification, too.
Personally, I think they should have done a "Chuck" style format. "We play everything." It would have been totally different for the New York market and I think it would have gotten some good publicity and some water cooler talk. I've heard Chuck style stations play everything from Whitney Houston to Johnny Cash --but only the big hits that everyone recognizes. The attitude on the air would have been the way to sell it, too. It wouldn't compete directly with CBS-FM either -- at least I don't think so if they programmed it right. They would also play currents.
Then, as time marched on, they could tweak the format to lean a certain direction.
Cox was exceptional with doing something like this with their AC stations. They would come into a market (think Tampa and Miami) and be a light AC stations. The Commodores, Lionel Ritchie, Kenny G, Fleetwood Mac, Billy Joel, mixed in with newer, soft stuff. They promoted the crap out of the station. TV, billboards. And over time, the moved into a heavier AC playlist - dropping the token Sinatra and older stuff. Now they're #1 in Tampa with WDUV and in Miami with Easy 93. The company had patience for the format to develop.