I wasn't suggesting that the Midwestern dialect was to or should be privileged in some manner, just that it's closest to some neutral, American dialect, rather than being identified with a particular regional accent. OTOH, it's something that proponents of radical orthographic reform / change never seem to think about. A "phonetic" (maybe more of a phonemic) writing system would be different in different parts of the States.

Ceci n'est pas un seing.