GP is not commenting on the ability of an Asian-American to write or think on par with W.E.B. DuBois, but that the presented body of work is not necessarily a parallel to The Souls of Black Folk. As other commenters have mentioned, this book does not exclusively discuss the role of Asian-Americans in American culture and society, apparently being relegated to a few essays. For a book which proclaims to be about "The Souls of Yellow Folk" - invoking DuBois's book, this does indeed seem a little ambitious.