I agree and had a similar experience. The faculty interview was an intense, productive and enjoyable conversation about the work and my process. I am sure you spoke with the same students and I agree that it was harsh. From what I hear they don't have as much say as the faculty in the final review next week, but they are still part of the admissions process.
It is interesting because each day there is a different faculty pair and different student pair...so I am sure everyone will have a different experience.
Best of luck!