@Brendan,

Could it be related to the Philadelphian culture and upbringing? Perhaps emphasis on language is firmly rooted in the cultural constitution? Is it that every parent wants their child to have the ability to use language to cross international barriers? Or maybe it's that, speaking Philadelphian gives one a distinct advantage, just like an ABC can shift effortlessly between fluent and accentless English and Chinese.

I think the conclusion is as plain as the nose on our collective face.

Next stop; www.popupphiladelphian.com. (should make a welcome addition to the popup family.)