If they have various snacks you can get on the DDP, I would assume their sandwiches also count. I also agree with you about their sandiwches because they are amazing.
It was in Feb 2008 and the sandwiches were YUMMY....even my DD's PB&J was great and I'm not a huge fan of PJ&J. If you go and the line is insane, don't let that discourage you. They are relatively quick and the food is worth it.
We were just there the last 2 weeks and we ate at Earl's twice for lunch. The lines were long but well worth the wait. There were 6 of us and we got a variety of sandwiches. With the DDp you get a sandwich, dessert(cookie or other packaged dessert) and a drink. I think it is a great use of a counter service.