see, here's something I was thinking about this that Jane wrote
".....expressing language in a country would be very similar rather than as completely different as ASL and spoken American English. "
......BUT- ASL and English -are - completely different. Why should they be the same? The two don't parallel and you keep trying to put them there.
Why should English - spoken or written - be the standard to which other languages used in America, are held?
Seems that the original question is an ethnocentric one.