I don't understand the survey, but that's typical for me -- I haven't been able to make sense of *any* of the gender survey results that have been shared here. I think there are too many *other* non-disclosed factors and demographics that lead to those choices, rather than simply boy" vs "girl".
I'm a female with all three -- tablets, e-ink readers, and smartphones, plus an iPod Touch (which is either an unconnected smartphone or a mini-tablet, I am not sure what category it falls into.) I'm pretty sure that I didn't choose these items because I am a girl that wants to use them in girlie ways; I chose them because they meet *other*
non-gender related needs that I may or may not share with other people who are either my gender or not my gender.