Hakatan: Just to clarify, Modern Orthodoxy also had Daas Torah, just not yours.
The reason why MO has a higher OTD rate then other groups is because all the yeshivish, litvish and chassidish boys and girls who are frustrated with the insular way of life they are forced to lead got fed up and found a more enlightening derech to Hashem. Unfortunately, after years of being forced to observe the mitzvous instead of teaching them how to love it, all the mitzvous seem abhorrent and they go off the derech completely. You should think of MO has the Jewish Safety Net which is the last step before people go completely off.