>>>One should probably exclude those who have been so assimilated that they are not distinguishable from the general population (I suggest such matters as observance of Shabbos and Kashrus are key factors in deciding whether one has assimilated).
New Pew results: 100% of Jews keep Shabbos. 100% of Jews keep Kosher. 100% of Jews are orthodox.
Besides for the fact that it would be a lie, what would be the point of the survey anyway?