Subway interview questions

It lasted less than ten minutes. It seemed to have gone well, the owner seemed very nice. He asked me about myself so I told him that I was a high school senior with a 3.5 GPA and I was looking for a job so that I could earn money for college. I told him I lived close so that Subway was a good candidate. Then he asked me about the activities I listed on the application, ecology and spanish club. I told him about what I do, especially being the treasurer. He told me that he just got back from Mexico last week, and I asked him if he enjoyed himself, saying he did. Then he asked how many years of Spanish I took; I told him four. He asked if I knew anybody who worked there, I told him the name of someone who works there who was in my Spanish II class. Then he asked when I could I start, which I said as soon as possible. He asked if I would object to working at either of his two other subways he owns and I told him that I would work at those too because I had a car. He then thanked me, and I thanked him for the interview, then I left. I think I represented myself well, but the Subway is next to my school, and I couldn't help but look at the school when I was talking about my clubs. I had eye contact with the owner for the other 2/3 of the time, but that wasn't the first third and first impressions are key. I'm kind of embarrassed about that. I'm also kind of worried about the interview only lasting 10 minutes. Is that normal for a fast food place?