Oh, my. Unlikely? I'm not even sure I'd buy less likely without seeing the data.
Given that sociology is the most liberal discipline (except maybe linguistics) in today's liberal universities, you wouldn't find a whole lot of recent research on this unchanging truth in, say, the current issue of the American Sociological Review. However, a look, at a college library, into sociology of the family textbooks from the 1950's, checking out family disorganization in the indexes, should lead to mounds of vitually undisputed nitty gritty statistical evidence.
Here's a good recent article:
Another good link: