I am happy to hear that Koch's is still there. I used to go there in the 70's when I lived in center city. On weekends it would be very crowded but the wait was ok because the Koch brothers would hand out pieces of meat and mini sandwiches. It was like a party while you waited and like you say the food is good and worth the wait. I was there again in the 90's when I went to The Restaurand school. I think I'll take a ride to west Philly this week to check it out.
re: Chef Stefano
Koch's is an institution to many Penn and Drexel present students or former students. The place is about the size of a shoebox, but there is always comraderie in the crowd, samples of delicious cold cuts while you wait, and Bobby Koch telling off color jokes. I hadn't gone in there for a while after Lou Koch (the other brother that helped to run the place) passed away a few years ago because I was too heartbroken and was afraid I'd break down crying if Lou wasn't behind the counter. When I finally got up the courage to go in again, it was as if no time had passed at all. I was greeted by name, asked how my family was and had the best sandwich this side of Katz' Deli in New York City. I just ADORE this place and hope they're in business forever! This should be high on any Chowhounds list of great places!