I found it here.
[A] new study forthcoming in the journal Pediatrics shows that lesbian couples raise healthier children than straight couples. Gabriel Arana of TAPPED suggests that maybe lesbians do better on average because they are a self-selected group of highly motivated parents that had to overcome obstacles in order to raise their kids. Or maybe two moms are better than one.
As Arana notes, the politically important thing about this study is the finding that same-sex parents are doing at least as well as opposite sex parents. Conservatives opposed to gay rights have often justified second-class citizenship for gays in terms of protecting children from allegedly harmful same-sex parents.