kim you know i also thought that being called mate was a sign of someone treating you in the masculine, but since then i've seen so many boys call women mate, that im starting to think its not the case.
lots of guys say mate without thinking, if they aren't concentrating on you, its possible they are just saying it through repetition rather than gender recognition?
what im saying is that most of the time, they say 'mate' because they are addressing a male, but its not always the case..