Hi! Mine for writing was 20 minutes, and that included a few questions I had for them. Not sure how that compares. But it flew by. I've been stressed about it because, while it was a super friendly, smooth, easy conversation, I worry I didn't impress them enough, or supplement my written application enough. In other words, I worry the interview didn't add anything (or enough) to my application. On the other hand, perhaps their primary goal really was to just get an idea of my personality/see how I hold a conversation/see how comfortable I am describing my ideas (obviously an important skill in this industry). It's hard to say exactly what they were looking for, but I think if you feel you were a good conversationalist, gave them an idea of your personality, and used those softball questions as opportunities to confidently express yourself then that's really the best you could do. I hope this is helpful!