In Central Jersey, where I grew up (Plainfield), the term was always "sub," not "hoagie." As far as I was ever concerned, the term "hoagie" was used elsewhere as a name for sandwiches more-of-less similiar to real submarine sammiches. Of course, this dates back MANY years before there was any such thing as the Subway chain, or any fast-food chains for that matter.

The sandwiches at Mike's Sub Shop on Washington Ave at North Ave (Rt 28) in Dunellen are pretty hard to beat. (Not to be confused with the johnny-come-lately chain "Jersey Mike's Subs," which is OK but kind of corporate.)

The link that Becky/Desert Dancer provided for a discussion about the dividing line between North and South Jersey, sadly enough, leads to a site where NO messages have been posted, just the title.

To my mind, the dividing line depends upon whether you are defining two areas (north and south), or three (north, central, and south). When I was in high school, the way that the interscholastic sports administration divided the state had four public-school regions (North 1, North 2, Central, and South) but only two private/parochial regions, North and South.

I know that "Parochial South" extended up through Trenton and beyond; my school in Metuchen (northern Middlesex County, near New Brunswick) was even considered "south" in that context, although no one would ever consider that area as anywhere near "South Jersey."

And its' not really "North Jersey," either ~ my old home "tri-county area" of Union/Somerset/Middlesex is pretty definitively Central Jersey, along with Hunterdon and Warren to the west. Central Jersey might extend as far north as Morristown and/or south to Trenton, or at least Princeton.

That public-school-sports division of North Jersey into two halves makes a certain amount of sense. The northeastern part of the state is very urban, very densely populated, while the northwest is hilly, scenic, and "exurban" if not downright rural. The stereotypical "Joisey" accent and culture is really a feature only of the extreme northeastern part of the state, immediately adjacent to NYC; you won't find it in the south, central, or even the northwestern areas.