When I watch the show (And oh, yes, I do. I can't stop anymore.) I'm much more interested in the non-cast members (The Grenade!) who appear now and then. Rather than being cast (and at least partially scripted) like our Guidos, these locals are just acting out as their natural selves, whoring it up for the camera like a 9-year-old jumping up and down behidn the newscaster on the corner.
I guess I find the common, trashy Jersey folk more close to home than the Poughkeepsie Princesses MTV has shipped in. I've spent my share of time at the (South) Jersey Shore, and Philadelphia tends to contribute a much subtler form of Guido to NJ than NY, CT, and RI. People like The Grenade remind me of my neighbors; Snooks is completely alien to me.