Interesting topic-I don't have TOO much to add to this except that we were in DE and the MD Eastern Shore albeit most of the time inland.
From the Dover DE area the NYC AM's were in quite strong particularly along the river just east of town.
From Whitehaven MD- a really laid back area (w/ a nice small hotel) along the Wicomo R about 15 mi SW of Salisbury MD, the Norfolk AM's were booming in-The area is a salt marsh. The NYC's AM's on 660,710,770 and 880 were there during the day, and this on a real $hitty car radio.
The most interesting observation was the large number of very large TV antennas, some on masts of 50 feet. I should have got them on pics on the cell phone, downloaded it etc, but I am techonogically slow, if not backward. I'm guessing these folk could get a TON of analogs but will be absolutely $crewed when it comes to digital since Balt, DC, Norfolk, and Richmond (and possibly Philly) are probably just too far. And I'm sure there must be some killer tropo days in that neck of the woods. This probably leaves them with Salisbury TV OTA. But I did not get a chance to discuss TV reception with the locals.