Just a point of fact, the head of Ramaz (a VERY MO school) contacted Rabbi Pruzansky to discuss the report. Rabbi Pruzansky admitted that he never actually read such a report, but rather heard about a report. We know nothing of who conducted the survey; how it was conducted; who were the respondents, how large the sample was, what questions were asked or what definitions were used.
It might have been enough info for the rabbi to give mussar to his shul, but certainly not enough for us to pass judgement on an entire group of frum yidden.