[froogle]

The title is somewhat misleading, I think.

> In total, the visual recognition API classified 1,428 profiles as masculine, 84 as feminine and 1,964 as unclassified.

> The top 100 Stack Overflow users consist of 77 masculine profiles, 21 unclassified and 1 feminine profile.

They only identified a single account belonging to a female, but there 21 unclassified accounts in the top 100 that could also belong to females.

I would certainly expect women to be more reluctant than men to note their gender on their online profiles.