It's a really interesting question. I always thought a girls school would be great for DD, but she only socialised with boys all the way through primary school, so how would a single sex secondary school work for her? She had no female friends.
I was worried about sending her to a coed secondary school as, although she couldn't see it, my suspicion was that the boys would drop her at secondary school as it wouldn't be cool to hang out with a girl.
As it happened, she matured way quicker than her male friends and she was the one to drop them. For the first time in her life, she actually has female friends at school. Interestingly the friends she has aren't girly - neither is she - they are into computers and gaming. They show zero interest in boys, boy bands, makeup or preening for male attention.
She is irritated with the boys she used to be friends with. They seem babyish to her and they DO interrupt lessons (I can hear them on the zoom classes they are currently doing during lockdown).
I understand the PP who was disappointed that boys get the 'blame' but it is all down to when children actually mature - it's a fact that girls mature earlier than boys. Boys are still running around carefree while girls are dealing with periods and bras at primary school.
I saw the gap widen in maturity between DDs male friends and her when she went through puberty in Y6. I'm watching with interest to see when it closes up again.
Boys get a much longer childhood!