Last I heard, she's using SF in this way:
Blanket term: science fiction
Devides into:
1. Science fiction proper (gadgets and bug-eyed monsters; "talking squids in space")
2. Science fiction fantasy (epic fantasy + sword and sorcery, mostly)
3. Speculative Fiction (social SF, utopias and dystopias...)
That's quite different from the market designations:
Blanket term: Speculative fiction
Devides into:
1. Science Fiction
2. Fantasy
3. Horror (as long as it contains "speculative" elements)
She hasn't changed her tune, really; she's just tagged a blanket term over her original distinctions, as far as I can tell. It's important to note, that to her "science fiction" (or now "science fiction, proper") was never a dirty term. It just wasn't what she thought she was writing.
I doubt you can hold with that definition, if you're an avid magazine reader. But if you're basically caught up in the mainstream-publishing world, and you read the occasional genre classic (which you tend to put into a longer tradition), and then you'd also remember the b-movies and pulps from your youth (Creeping Eye anyone?), I can kind of see how you'd come up with that. The rest is mostly a matter of old habits die hard.
My impression is that she's living in a world of her own and has trouble pushing through to genre audiences. She's trying, occasionally, but not very hard, since they're not her target readership anyway. She's not hostile to SF, not even to "SF proper" (it's just not what she thinks she writes). That's very different from the sometimes-encountered claim that "I don't write SF; I write good stuff!" I never got that impression with her.