See, the thing is, both replies jumped directly on the point I was trying not to make.
I wasn't answering with my belief, nor was I saying that gay parents are worse, but trying to get at where the root of apprehension might lie with liberal-minded folks, such as the case was in the article.
What I was trying to say is that such a belief is fairly prevalent and well short of nutjobbery.
Ah, I gotcha. I do agree with the rest of your reasoning.
I've had this debate before (strangely enough, at a faith-based LGBT family meeting with leaders of the Willow Creek megachurch in Chicago), and that particular point has been a sore sticking point. In its weak form (as you've presented) it does nothing to address the matter of LGBT parents, and in its strong form (gay parents are worse), it contradicts pretty much all available evidence.
The APA's official stance (one borne out by my personal experience with gay families) is that there is no difference in the well-being of children raised by two same-sex parents or two opposite-sex parents.
"...the results of existing research comparing lesbian and gay parents to heterosexual parents and children of lesbian and gay parents to children of heterosexual parents are quite clear: Common stereotypes are not supported by the data."
http://www.apa.org/pi/lgbt/resources/parenting.aspx