Considering Nintendo has a monopoly on the female market for home consoles, I'm thinking there is some mistake here.
The successful PSP games are very male oriented, the fact that DS isn't mentioned is suspicious. I think the original Nielsen blogger made a mistake and that mistake (like they've done before with their graphs) has been repeated by the press.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.