A few weeks ago my dad and I finally fulfilled this obligation and trekked down to DiNic's. The roast pork lived up to all the hype, period!
Between the two of us we had a roast pork with broccoli rabe and one with hot peppers. The pork was perfect with just the right amount of juice. We both agreed that the secret is the freshly shaved sharp provolone, a must order with any sandwich at DiNic's. You can't go wrong with any sandwich there, although in my view the hot pepper sandwich had the slight advantage over the broccoli rabe.
We debated about waiting in line for a third sandwich, likely the best testament to the awesomeness of DiNic's. In a rare family occurrence, we decided against, but only because the line was too long and we needed to get to a Phillies game. We are itching to go back to try a roast beef or brisket sandwich.
Hopefully DiNic's new expanded space in Reading Terminal cuts down on the wait, but not the quality!
Some pictures below.