Well, it's still sort of uncommon to admit you like manga and/or anime, I believe. So most idols won't admit their geekness in public that often. That's like the cat or dog preference that santos discusses a while ago, most female talents say they like dogs

And I'd think spending [a lot of] time online is pretty common, after all most Japanese have those cool cellphones >_<
Well, anyway, Shoko could've not been the first, but she got her popularity *only* thanks to her blog, and she can draw well, so I'd still give her Queen of Geeks crown

Sonim <3