Funny that you question it, because
@pinkpuppy9 said the exact same thing last year, but yes they really do mean it. If your SIS is above 790, you get an interview. Remember that last year was their first time doing interviews so I'm guessing they wanted to get a large pool to be the guinea pigs. They might increase the minimum this year or they might want a second round of guinea pigs. I called last year and they were pretty up front with how they select for interviews, so you shouldn't have a hard time getting a precise answer from them on whether the minimum has changed.
The original number we heard was 420, but when we asked during the interview debriefing, they said the final number was somewhere around 460, but I can't remember the exact number. And I agree that they handled it perfectly. Everything was scheduled well and I
didn't feel lost in the crowd like with some other schools.