I shoot three of the came color feather, and I don't even think about cock/hen...whatever. Unless I'm shooting vanes (which I don't do) I don't see a difference in flight characteristics.
To my way of thinking, especially in the hunting situation, I don't even want to think about cock feather in or out. Put the arrow on the string and let 'er go. Keep it simple.
My 2 cents.
J