The throwing gap has been researched for more than half a century, and the results have been consistent. The overhand throwing gap [between boys and girls], beginning at 4 years of age, is three times the difference of any other motor task, and it just gets bigger across age. By 18, there’s hardly any overlap in the distribution: Nearly every boy by age 15 throws better than the best girl.
The question is why!
The question is why!