I didn't even blink when my cousin came out. She was still Sarah, it didn't matter who she loved as long as they were good for her.
I think it surprises me as my parents have very different views and they're views I heard a lot. My mum told me when she got off the phone to my cousin that R had changed her name and told me what to and it took me a second before it clicked and I asked if they were having the op. My mum keeps calling him R and seemed surprised when I automatically changed to using their chosen name and calling them he/him.