"Social psychologist Emily Pronin at Princeton University in New Jersey studies the differences between how we perceive ourselves and how we perceive others. According to her research, we tend to view our own judgment as sound but the judgment of others as irrational; recognize the biases in others but not ourselves; and see ourselves as more individualistic and others as more conformist."
Yes, hard to disagree with that...but quantitative evidence is nice to have I guess. Also, the concept of free will in the study seems a little confused. But then, if people are mostly confused about free will in the same way, then it probably doesn't matter in terms of interpreting the results.