Having been an active member at the VAA for years, I can say without a doubt that you will not have any trouble finding females. In fact, you will have a harder time finding interested men. It's just the way the website works.
To get more auditions, I'd leave out the mention of the timing requirements, as it will turn people away. This is an audition, so you just want to hear their voice and their ability (and mic quality). Don't burden them yet with ADR stuff. That's for after auditions.