Accurate about what? I have no idea what you are posting about. And I am not sure that you are either. I cannot remember when Indiana was not ranked in preseason voting. Ranking is by definition an ordered listing according to some variable. In the case of polls, it is votes assigned. At present, NW is ranked 27th in the AP poll, they have less points than 26th (Missouri) and more than 28th (Illinois.) In the USA TODAY COACHES poll, they are 26th behind Texas A&M and ahead of FAU.
I am sure that it may have happened at some point, but without looking it up I am fairly confident that IU was listed in the AP voting in most of the recent past years' preseason voting. Is it your contention that it is not true? If so, then they subsequently underperformed their preseason ranking because they were not in the receiving votes group at year's end. I say that I am confident because IU fans made mention of it with glee and remember it clearly. A common theme that IU fans remind us of every year is that their recruits are more highly rated and thus will outperform Purdue. Is it your position that does not happen?
This year they were preseason favorites. At present, they are tied for 2nd place, 2.5 games out with 6 to play. If you are the favorite, finishing 2nd or worse is underperforming expectations by definition. Now, it is fair to say that there exists a mathematical path to a first place tie or even win. But that path is fairly narrow. Every Purdue win and/or IU loss makes it even more narrow. If you are really confident in your view, I'd suggest that you place a bet with one of the betting services online as I think that you could really get long odds with a good payout. However, that is not a bet that I would encourage you to make.