Your other option is to forgo k1 and get married and live in China with her.
Waiting makes more sense.
You'll get a response at about the 13 month mark. You're almost there. It shall be well.
I dont believe it's unusual either. i130 also isn't too quick. They are both similar waits now. I think the fact that they get green cards immediately is what lures some to not choose k1.