I really don't see how they could come to any other conclusion given the full faith and credit clause. I get the feelings that the pro equal marriage people don't want to press this point b/c it would certainly increase support for an amendment to the US constitution. Still, it seems inevitable that sooner or later somebody is going to challenge this.
It isn't clear what form of recognition you have in mind. It is utterly clear, however, that neither the original meaning of the Full Faith and Credit Clause, nor modern Supreme Court precedent, provides any basis for thinking that a traditional-marriage state would have to generally recognize out-of-state gay marriages.
