I hope your interview went well! So basically if we didn't get an interview, our writing sample wasn't strong enough? Is that what it means that is has been qualified?I interviewed with him as well, and he's very nice. I felt the same way you did; it was very conversational, and it seemed like they wanted to learn more about us while also sharing info about themselves.
He mentioned that if you get an interview, it means your portfolio has been qualified. However, the final decision will depend on the diversity of the small group they're assembling, as they need to consider the different backgrounds of the applicants.
I was a little bit nervous as well.