This brouhaha about gender identity requires some 'fixed points' about gender that I thought we progressives had all already agreed were nonexistent!
But I don't think the point about the author's personal experience of not "feeling like a girl" proves anything - see "cis by default", or http://slatestarcodex.com/2013/02/18/typical-mind-and-gender.... It's possible that there are people who do feel strongly that their body doesn't match what their mind is telling them, and it's a cause of suffering. As I understand it, it really is all about sex in this case (which makes the author's quip about her "true self not having arthritic knees" irrelevant).
But I don't think the point about the author's personal experience of not "feeling like a girl" proves anything - see "cis by default", or http://slatestarcodex.com/2013/02/18/typical-mind-and-gender.... It's possible that there are people who do feel strongly that their body doesn't match what their mind is telling them, and it's a cause of suffering. As I understand it, it really is all about sex in this case (which makes the author's quip about her "true self not having arthritic knees" irrelevant).