I completely agree, with this.
Another good point towards Wayne being respectful is that one scene with MeLann-- I think it's in BOM. She had to look like a security guard or whatever so she uses a masculine build for her body. upon asking if Wayne was alright with it, he said he was. I can't remember what exactly he said, but I don't remember it coming off as condescending or rude.
Even if there is a little bit of sexism in his character at the start of the story, I think he clearly learns and moves past it by the end of the series, as part of his character development. (Like Sokka, I guess). He learns to live with Steris, he respects MeLann, and he trusts and relies on Marasi.