They state that generally females are diagnosed adhd-pi higher, but there may be other factors. However, Females are generally diagnosed less with autism:
(From wikipedia) "Several theories exist to explain the sex-based discrepancy, such as a genetic protective effect,[7][8][9] the extreme male brain theory[10][11] and phenotypic differences in the presentation between sexes,[9][12][13][14] which may all be intertwined. Researchers have also debated whether a diagnostic gender bias has played a role in females being underdiagnosed with autism spectrum disorder.[15] Researchers have also speculated a gender bias in parental reporting due to the expectations and socialization of gender roles in society.[16]"
Thought I would indulge your theory, and give more food for thought.