51 votes, so far, and only the Kindle has more women (or the other way around). Yet, all e-readers have equal share of man and women, except the Sony, overwhelmingly a "male" device. Also, it seems women hate Bebook/Hanlin.
Gender aside, Sony is MR's favourite e-reader, while there's a fair equilibrium among the other devices.
Talking only about gender, we have considerably more male readers.
Also, it should be noted that these results might be circumstancial and they have a very low correlation value