"Average" is about right for the Duke. We go fairly often - there's lots of space, the service is generally friendly. The food isn't going to knock your socks off, but it's good enough for a beer/burgers/fries kind of meal.
I have to say that they've improved the beer in the last couple of years, adding a rotating selection of at least one beer that is something approaching a craft beer, which is an improvement over the past when they just had commercial beers.
It can be pretty studenty, but the worst of the students (loud frat boys, drama queen just-turned-19-at-midnight girls in high heels) are elsewhere.