That would be cool to be able to say my talk show was on a top 10 market, rather than market #76 at the time, today #77. Of course WILM can't be heard in most of the Philly radio market area, but hey why get picky, haha !
Cecil County is kind of split as folks there commute in both directions, north towards Wilmington and south towards Baltimore. Many of those folks actually do a lot of their shopping in the Newark/Glasgow area due to the tax free shopping, so they do relate to New Castle County, probably more than they relate to the city of Wilmington. I'd agree with you that yes, Cecil County is Orioles and Raven country far more than it is Wilmington Blue Rocks or Phillies or Eagles country. So in today's world probably the eastern side of Cecil would link with the Wilmington Metro, but not to the degree of the past, but more than Balt, but the western side would certainly identify more with Balt and probably very little with Wilmington or NCC as there are other places closer today to go to shop for that part of their county.
Salem county NJ, which still is a very rural place (actually a very nice place if you can afford the high taxes and horrible property taxes, probably was linked to Wilmington as the ferry connected them directly to Old New Castle, which linked them to the downtown shopping of Wilmington back in the day when downtown Wilmington was an actual destination worth traveling to. Philly was a much further journey so they probably did relate more to Wilmington then than Philly. Today, it is less so, but there are a pile of NJ cars driving in and around the New Castle/ South of Wilmington area for shopping, and employment as it is still a shorter journey to come to NCC than Philly from Salem County NJ. So the link is still there, but I'd agree that people today aren't as locally oriented as in the past. Obviously for TV, Philly is the only game in town, radio probably some listen to Wilmington radio and others, depending on what their ear likes, Philly radio, just as folks on my side of the river do.
I'd also agree that in today's world, especially as most people living in the Wilmington area are NOT locals, but transplants due to DuPont, ICI, Hercules, the gazillion credit card banks here, etc. So they don't have that local loyalty that someone like me, a native born Wilmingtonian would have, so yes, I'd agree that today, probably most see this area as being a part of the greater Philly Metro Area or as a bedroom community to Philly (as our TV, much of our radio, our major sports, and even much of our cultural stuff, plus a more exciting nightlife scene for the young, all comes from Philly) and these folks see as the sub set their home being Wilmington and vicinity, and actually more likely not wanting to claim Wilmington at all, due to the city's failure to be a place anyone would want to be, so most people probably see their home being as the New Castle County area as a subset of the Philly Metro.
Note how the former Wilmington Symphony became the Delaware Symphony, even the Wilmington News Journal dropped the Wilmington from their mast head and is simply the News Journal also they are located in the county outside of the city. None of the radio stations are actually located in Wilmington, other than some of their towers, but their studios are in the county. I'm sure if the FCC didn't have a requirement to say Wilmington in the legal ID, most local stations here would probably opt to not say Wilmington as most of their listeners are suburbanites who don't really identify with the city. So most folks today do relate to New Castle County far more than Wilmington. Wilmington has become basically the postal zone for most folks mail, but not much more. As the largest city in Delaware and the only one with any sort of city skyline, etc, Wilmington by default is the name used to describe our local metro area. Other than suburbanites who work in the city, most suburbanites avoid the city like the plague.
But the powers to be still give this area it's own metro status and own radio market. Now part of that might also be so that each state has its own metro area and have a radio market. As it is, Delaware is the only state that doesn't have it's own real commercial TV station, or any passenger airline service (yet we have the 11th busiest train station in the nation and the shuttle companies serving the Wilmington area via the Philly airport are doing great business. If Wilmington was located where Dover is, we'd probably not be having this discussion as that Wilmington would have it's own TV, and probably more radio, it's own commercial air service, maybe not just a minor league baseball, but minor league football, basketball, hockey; its own metro area that wouldn't be a part of Philly's, etc. Unfortunately, the real Wilmington is so close to Philly that hurt those things.
Matt, my prediction: is that eventually those Dover radio stations will be added to the Wilmington radio market as the actual "Wilmington Metro Area" extends more south to Dover than east-west between Cecil and Salem counties today. There's a far more solid connection between Wilmington and Dover than was in the past.
Delaware is a small place with a small population as compared to all other areas in the Northeast between Boston and Washington. So what little local identity we in New Castle County have can easily get over shadowed by the much larger Philly and Baltimore markets near by. It is what it is.