I don't believe the week difference matters as this has been the ticket situation for several weeks. I do think the holiday break matters and had not thought of that when posting the question. I would not be confidant in a complete sellout though. Even last year the Wisconsin game drew 14,098 in a similar situation which was the smallest announced crowd of the year (obviously many of our pre-season cupcake "sellouts" with students had way less in actuality). The lower level will sell out but don't be surprised if we get a similar 14,000-15,000 crowd like we did last year and the smallest of the Big Ten season.
This is the one game you really wish students were here and we had a maximum atmosphere. Remember Wisconsin was the team that came closest to beating us in the Hall last year. This game scares me a lot and is the one game at home I am not confident we will win. Just for reference I was very confident we would beat UNC and Kansas and was really worried about the Butler game (so far the only game that has fooled me is Fort Wayne). If anyone is interested I have a good feeling about the Louisville game.