Yeah, mine was really short too. It was a morning interview, and I came in 30 mins early, expecting to meet other people/students there and mingle around. I was the only person getting interviewed on that day. The secretary was surprised at how early I was and told me to just wait a moment while she inform the admission lady that I was here for the interview. I think by the time I finished the interview, it was 5 mins past the actual time the interview was supposed to start.
Did you tour the campus afterward too? It may sound silly, but I think the tour was the most redeeming part of my trip to Iowa. I was kinda iffy about the school/town. But that tour guide/student really made me feel like maybe it won't be so bad if I do have to spend 4 years there. And the free meal ticket to their cafeteria was golden! I was quite impressed and thought to myself: "so that's what they serve in a private school's dining hall"
anyway, good luck to you! me personally, I got accepted elsewhere, so I'm not really thinking much about Drake anymore. I am just curious to see if I did make the cut or not, but no more than that.