The interview proccess is streamlined. The longer you stay in the room, the more new faces you see, the more hands you shake are all key indicators that you are not wasting your time in the proccess and that you are being seriously considered for a postion. Be prepared to bring your "A" game, know how to do your job and be prepared to physically show proof that you know what you're doing. A resume only gets you so far, what you can actually do is what is beneficial. "The proof is in the pudding"