You know, every time the rankings come out in October, there are always a group of people in every fanbase that say "these rankings don't matter, talk to me in January".
Well, they most certainly do matter for a few reasons.
1) when you're ranked just inside the top 25, all it takes is one loss and you're out of the rankings and who knows for how long.
2) you beat a top 5 team, but since you were ranked so low, they refuse to jump you ahead of the team you beat, because some of them think it was a fluke and some think that's just too far to jump someone.
3) the perception all year long is that you are not a top 10 team and even if you make it up to 10th, all it takes is one loss to a middling team on the road and you go back to where they think you should be, because pre-season rankings left that impression.
Hopefully Pope and the guys can prove the duke win wasn't a fluke, so this team isn't fighting an uphill battle all year.