One advantage that football has over every other sport in this country is time. Teams only play one game each week, providing most of the analysis used for the upcoming matchup, making it impossible to make definitive statements after two weeks.
All that can be said about college football and the top-25 rankings through two weeks in 2015 is Ohio State looks really good and Auburn should not be ranked despite two wins.
Looking ahead to Saturday's games, the SEC has the two marquee matchups involving ranked teams, but that leaves a lot of room for off-the-radar upsets.