New Jersey's divide: how unique is it?

We ask this question at the beginning of our film. Switzerland, Belgium, Sudan, Italy, California, Illinois . . . there are tons of places in the world where they have a North-South (or East-West) divide and many others within those. Hell, James Carville called Pennsylvania - Philadelphia and Pittsburgh with Alabama in the middle.

While acknowledging these places in the film, we also tried to point out how this North-South Jersey divide is unique. . . but also trying to find "what we have in common" at the end.

What do you think? How unique is Jersey's cultural divide compared to these others?