Annabel, I, too, have read Anne Vitale and basically subscribe to the ideas that you very adequately described.
I also subscribe to the notion that our gender sense is, in part, influenced postnatally. For me, the postnatal phase, through early childhood, reinforced my assigned gender to the point where I refused to acknowledge any suggestion or inclination toward the feminine despite being drawn to girls and girl behaviors.
It is only in looking back that I can see that my feminine side was trying to find expression. For me those moments were subtle, but very revealing in retrospect.
My subconscious crossdressing desire revealed itself as early as the 5th grade when I refused to wear a costume that bared my legs. Seems counter to my supposition, but not really. My strong emotional response was an act of suppression of my subconscious desire to wear girls' dresses and shorts (boys in those days did NOT wear short pants where I grew up). Later, I woke up during a sleep walking incident and found myself wearing some of my sister's clothes. I was totally mortified at the discovery.
My point is the we can suppress our inner girl so effectively that she lies dormant for years and years. Then, one day something triggers her emergence, and all hell breaks loose. But, in the mean time, those buried feelings show up in seemingly contradictory ways. For example, before my gender awakening, I exhibited a kind of benign misogyny (hatred of women). Maybe male chauvinism is a better way to put it. It was a way to reinforce my maleness and distance myself from the feminine. Funny how all those disparaging attitudes towards women have since disappeared.
Does anything I say make sense? It's getting late, so I'm not thinking too straight.
CK