[zawerf]

Still true globally at the high school level. Found some quora answers with perspectives on IOI(programming olympiad) and IMO(math olympiad) which both have low single digit percentage female participants:

https://www.quora.com/Why-are-there-few-females-in-competiti...

https://www.quora.com/Why-do-boys-outperform-girls-in-math-c...