How would identify a female player guy/girl?

[Amenian]

Someone said it's 50% so I corrected them...

You may want to reread what I said. For a refresher, this is what I said:

"In my experience, there tends to be a 50-50 split on whether a female will play as male or female."

So female gamers that I personally know tend to be a 50-50 split, not 50% of all female gamers play men. You didn't correct anything. You just threw your ego around.