Well, I'm not sure how an official SE census could show their male/female ratio - the article itself claims that its unsure how they got that 7/3 ratio. Not that I doubt that, but I'd be surprised if they had any solid numbers on that... I dont recall entering my gender somewhere?
That being said: I am female - and started out on a male character. A friend of mine had convinced me to play the game but he had also told me about people hitting on his female highlander, something that I wanted to avoid. I'd never played an online game before and I wanted to play this first one in peace, not with people hitting on me or my character. I had no intention of actively hidding my gender though and if I got comfortable around people and they'd asked, I'd tell them.
After two years and being fed up with male elezen not getting decent long hair, I switched to a female Roegadyn - for the long hair and because she pretty much looks like as if she could beat someone up who acts like a jerk.
I've never experienced outright harrassment in the game towards me because of my gender, but the random odd situation happend, sometimes leaving me more or less uncomfortable - sometimes amused...
(One of my favorite stories happend back in ARR when we had to pug a tank for our Coil-static - for T3 everyone who could would switch to tank, to just run through and the best tank-armor most of the non-main-tanks had was the stuff from Crystal Tower. My pug-co-tank made a comment about how gay that looked and that real men would never wear it. I switched to the WoL-armor aswell, informed him that I'm infact not a man at all and proceeded with the raid... while he stood there for a minute and then replied "I hate it when a girl plays almost as good as I do" Pretty sure I sucked back then, but still did better than he did...)
Most of the times I had the pleasure to run into groups who didnt even noticed - or rather: didnt care.
And seriously: Why would they? Personally I dont care about someone elses gender - if I like someone, I like a person not a gender. Both males and females can be jerks - and I had plenty of "girly" glamourtalk with guys (infact they often care more than I do). There are several females in my FC - some married, some in relationships, some playing with their partner, some without... some single, some homosexual - and I dont see why any of that really matters when it comes to playing this game together. Thats also the reason why I dont inform everyone that I'm actually female, because it shouldnt matter. It doesnt make me "special" and announcing it would remind me a bit of this vegan-meme-stereotype where vegans have to rub it into everyones face that they're vegan xD
Infact for the first two months of playing together one of my now best friends (also female) thought I was a guy and it didnt make a difference.