hmm. i am sorry that your interview day at northwestern wasn't the greatest.
we did address the length of the day and it is now significantly shorter.
as for the group interview. admittedly, when i interviewed at northwestern, i too dreaded the group interview. however, after having gone throgh it, i realize it wasn't that bad after all. personally, i think the group interview is a great way to get a sense of how a student works with others. i would argue that medicine is a team sport. medicine is about communication, whether it be with members of the medical team, or patients. have any of you ever been to morning report at the local medical school? has anyone ever been on rounds with the the medical teaching service? if you have, you will quickly realize that medicine has LOTS of group interaction. consequently, you want people who can effectively communicate with others on many different levels. i think the group interview can bring that out a little more than a 1 on 1 interview can. if you are a complete mute during the interview, it won't help you...on the other hand, if you are overbearing, monopolizing, and aggressive, it wont help you either.
biggest piece of advice...and we will tell you this when you get her to interview as well. get to know your fellow aplicants whom you will be interviewing with. also, we definitely try to keep it as low key as possible. we aren't there to make you panic and pressure you. we really just want to see what you are like in person. are you pleasant? would people enjoy working with you in the hospital? realize that if northwestern invites you to interview, academically you are qualified and capable of being here. at that point, the school just wants to get a sense of you as a person.
as far as the recycled questions...i will do my best to not use "recycled" questions. though personally, i do like the question about the person sitting next to you. it forces the applicant to be engaged, and to be able to think on the fly, and to be able to provide complements to their fellow applicant. how someone reacts to that question can tell a lot.