Moulding of Proper English

We definitely have a type of proper english which is preferred over other kinds of English. For example, the type of English that Johnny Carson spoke is now the official English that every media personality (newscaster, journalist, etc.) has to use. It's accentless and straightforward with a hint of dramatism. If the news - in the exact same words - was televised in the African-American Dialect (sometimes called eubonics), or in a Southern accent, would we take it as seriously? Would we be wiling to listen to news that was televised that way? I dont' think we would, harsh as that sounds. We have a "preferred" way of speaking English that is considered more proper. I also think that, much like in England, "proper" English is class-indicative and culturally indicative. If one were to hear an Indian accent, our assumption is that the person speaking just recently came to the United States. While this is sometimes true, it's also true that people who speak in an Indian accent choose not to shed the accent whent they move to the United States as a way to maintain identity. So, an Indian person could have lived in the United States for 20 years, and when he/she speaks, people might still assume that they have recently arrived. Proper English in the U.S., while not exactly like the British way of speaking, is still a very real phenomenon.