All else being equal, if I had a daughter, I'd like her to go to an all-girls secondary.
I was in single sex education from 13 - before that was mixed. Comprehensive.
I still saw boys on the school bus, at swimming club, at Young Farmers and just hanging out round town.
Various activities - some drama, music, language exchanges - were shared with the boys' school and I had half my A-level classes at the boys' school (that depended on subjects.) But mostly, we could just get on with education. Like the stats, we had good percentages doing STEM subjects and sports.
I listen to The Life Scientific on Radio 4, and it's struck me that a lot of the women interviewed went to single sex schools. Some of that is age - women at the top of their careers will be older, and therefore more likely to have been in a grammar school before uni, which would have been more likely to be single sex. Plus I notice it because of my own schooling and being involved with STEM promotion at work. But even so, it still seems like more than I'd expect.
Of course, things aren't all equal, and it'd be better to go to a good mixed school than a poor single sex one, and children all have different needs and preferences, so what's right for one won't be right for another. But my preference is still single sex secondary education for girls.