I read Sturgeon as a kid. Maybe he made me think the field is more accepting than it is, but Sturgeon seemed to set the tone for the field as I have known it all my life. I rather like Tom Cram's comment on the article:
Sci-Fi has been at the forefront of exploring/exploding gender roles since its inception. The future of Sci-Fi isn't "queer," the entire history of Sci-Fi is "queer."