I figured Mark Regnerus would weigh in on this, but I'm glad he did it so soon and so well.
On: "Parent-reported measures of child health and wellbeing in same-sex parent families: a cross-sectional survey"
...until social scientists decide to do the difficult, expensive work of locating same-sex attracted parents (however defined) through random, population-based sampling strategies—preferably ones that do not “give away” the primary research question(s) up front, as ACHESS did—we simply cannot know whether claims like “no differences” or “happier and healthier than” are true, valid, and on target. Why? Because this non-random sample reflects those who actively pursued participating in the study, personal and political motivations included. In such a charged environment, the public—including judges and media—would do well to demand better-quality research designs, not just results they approve of.