Based on what? We have 4 Big Ten wins against teams with a combined record of 5-19 in the conference. Of those 5 wins, 3 came when they played each other and somebody had to win, the other 2 were against the dumpster fire that is Michigan State this season.
I guess it boils down to expectations, clearly there are a lot of fans that are content to do the minimum, beat bad teams and feel like that is an accomplishment because we got bowl eligible. If we weren't sitting here on November 7th with 7 wins it would have been really disappointing because it would have meant we lost to a bad team.
The good news is that the potential for a very good/great season is still sitting there, but based on what we have done so far all we have really proven is that we aren't a bad team, which counts for something but doesn't put us in the class of teams where most of us want to be.