I was interviewed on rice subsidies as well and my interview lasted exactly 15 minutes. The interviewer did mentioned that the policy discussion would last 15 minutes and the other 15 minutes was if I had any questions on anything (I only had one question).
After the conclusion of the interview, I am not feeling particularly confident about the outcome of this programme. I felt like I could have provided a much better answer to some of her questions. Particularly, I did not summarise the article very well. Too nervous I guess lol.