*A crumulent word I know, and I consider eastern PA, south NJ, and metro NYC [sans SE CT]) to be part of the Mid-Atlantic, based on what I grew up reading (sorry, AARoads).
I agree. I know that on the Suggestions forum, I and others have commented on whether the regional forums should be divided in a different way. I believe that ideally they should have been divided on state lines and not have one state in two separate regions.
As far as the different groupings of states that I learned in grade school:
New England, Mid-Atlantic, Southeastern, Southwestern, Midwestern, Plains, Rocky Mountain, and Pacific Coast states. And yes, Mid-Atlantic states were: NY, NJ, PA, MD, and DE. (VA and WV were part of the Southeastern states.