I must have missed this post, and since I don't get email notifications, I didn't notice you had tagged me.
It's still a tad early, but so far none of them are screaming cockerel. I am a bit suspicious of the black and white birds in the first picture though, especially the one sitting next to the red chick. Other than those two, I think it is safe to say the rest are all pullets, at least for now.