Outside of referring to the phenomena of OTD, there are precious few efforts at assessing the situation, nor has the focus been to study the issue from a sociological perspective. I have yet to read any generalizations about the subject, whether in Israel or in America that have any empirical value. We know it is happening, as we witness it continually. There is certainly a place for research to be done. Meanwhile, the focus of the Klal has been to create strategies to rescue these kids, whether by programs, professionals, askanim, etc., and there is much praise to heap on those engaged in these efforts. With all the tendencies to create groups, every such kid is an individual, with their own experience and issues. The one size fits all does not work, and every successful effort has its failures.
Nice question. I am more curious how one can answer than what that answer is.