The line about the "belligerent nerds of 2ch" is classic.
And yeah, it's not a geisha. I don't think the design represents a specific time period or class of woman, what with the the multicolored layers of kimono, those hair ornaments, and that makeup. Actually, I'm a little surprised it was designed by a Japanese person, because that kind of pretty mishmash is typical of non-Japanese artists. (I suppose you can tell it might have been done by a Japanese designer because the kimono is actually lapped properly. Meow!) I can't find the name of who decorated it, though.