Gay marriage is not "bad for children" — Unbelievable?

Currently listening to the Unbelievable? podcast from a week ago — the one about the detriment that children allegedly suffer when brought up by same-sex parents:

http://www.premierchristianradio.com/Shows/Saturday/Unbelievable/Episodes/Unbelievable-Is-gay-marriage-bad-for-children-Bobby-Lopez-James-Croft-Jacob-Clark

Direct audio download here:
http://cfvod.kaltura.com/pd/p/618072/sp/61807200/serveFlavor/entryId/1_047ph51w/v/1/flavorId/1_0tcghp1u/name/a.mp3

Knowing in advance that James Croft was a participant, I expected him to shred the idea that same-sex parenting is detrimental, and so it proved. Bobby Lopez, in fact, turned out to be something of a conspiracy theorist. Jacob Clark, who was fostered for a short while by two gay clerics, also contributed, further supporting the case for gay parenting.

My own stance on this issue is that it should not be surprising that a family with same-sex parents will be different in some substantial respects from families with opposite-sex parents, but those differences will be small in comparison with the difference in families of any kind, due to the fact that people are in general fundamentally diverse.