[quote=@Mr Allen J]
I can say I'm pretty good at guessing people's genders over the internet (Gotta look for mannerism, usernames, avatars, yadda yadda) - though, a lot of people come off as... androgynous.
[/quote]

RPGuild has taught me that I should just stick to gender neutral pronouns from now on, and this last mistake has just confirmed this for me.