you know, alot of otaku is actually good at english (met some of em, comparing to the 'other good japanese student' their english was vastly better). moetan was not a fanservice anime, but a research about how anime can influence those people by putting a chocolateload of english there, and see their average english skills.
that explains alot of anime these days has alot of english in em. like one example is durarara's ED song. K-on. and such.