Well ok, I am thinking that I have 3 girls and 1 boy. I guess that I will know for sure in about 2 weeks. I knew what my other ones were by that time.
I'm not saying you aren't right, just that feather sexing alone isn't reliable unless the parents are of opposite feather growth speeds...
Knowing your flock and the chicks they produce is a great intuition and skill...

I can usually tell the same with my Silkies and Ameraucanas and those are both notoriously difficult to sex until much older... when I hatch from others flocks, I'm usually stumped til they're almost fully grown, lol!