quote: I think Toms River is still South Jersey, while Trenton pretty much starts North Jersey. Discuss.

I would say it's the opposite.

Trenton, where I grew up, has a southern accent, and it always felt culturally closer to Philadelphia and to Burlington and Camden counties. Princeton is northern, so the boundary must still be somewhere around Province Line Road.

Toms River, where I live now, makes me feel homesick for the south. It's geographically south of Trenton, but it has a northern accent, and almost everyone who lives here is originally from the Newark area and they still go into Manhattan for shopping and entertainment.

I'm not a baseball fan, but the Yankees/Phillies map (at the "Where is the line between North & South Jersey?" site that someone else linked to) matches my sense of north and south. The first shore town I would unequivocally call southern is Tuckerton, as the map suggests.