I have read similar complaints about some other types of situations. I think it is informative because with trans people there is the Before/After factor. So have you noticed a drop in customer service that you can attribute to being perceived as transgender?
Not at all. All my name changes went over very smoothly and respectfully, be it in person or over the phone. And service experiences that don’t have anything to do with my being trans are actually nicer now. (Disclaimer: I pass and I live in one of the safest cities for queer people in the world.)