I do not recall how the ratings work... Is it at the time of the game or the rating at the end of the regular season? Purdue wont be #1 at the end of the season. So it will be a good win but they'll probably be around #10-#15.
who says, they will likely be in the top 10 if not top 5
anyhow the quads rankings have nothing to do with rankiing at the time but where you are ranked at the end of the year.