Not a big deal
I have had mostly boys the whole 4 years I have been mostly boys. Currently out of 11 enrolled only are 4 are girls and 1 of those girls is my DD who is in school most the time and the other is only here 2 days a week. My crew plays great together. They all play cars and dolls and picnic and dress up and build blocks and love open ended art and diggin in the dirt
I only had a parent comment once (in relation to a new child starting in August who they met when the child was a doing a few drop in last week), they said "another boy?!" and I said "I can't advertise specifically for little girls...its creepy"
They laughed and agreed.
If I had two families interviewing for a spot and I loved them equally - I would take the girl. But so far it hasn't happened.