Who ho has OSU played? Over the last 24 games? A lot of teams. A lot of teams in the B1G Conference in fact.
I honestly hate this argument. It's one of the most illogical and ridiculous arguments to apply to the BCS system. OSU plays in a conference. They are regulated to play the schools in that conference. They don't pick and choose who they play. Until the BCS is dead and there is a true playoff system, arguments like this will be made over and over and they don't mean anything.
Auburn got hot at the right time and beat the teams they needed to to get to the BCS title game. Alabama in my opinion could beat Auburn if they played again. They both have 1 loss records and Alabama has been ranked #1 the majority of the year until last week.
The FSU v Auburn game will be good but in many opinions it won't settle or truly decide who is the best team in the NCAA. But then again why does it truly matter? If you finish in the Top 25, the school's recruiting attractiveness is magnified, the program flourishes, the school's budget increases and scholarships are more available and education is the real winner. That's what truly matters.