To what extent, and in what ways, do you think exposure to TV has altered perception and use of language?

I have always felt that my lack of a local or Southern accent (vocabulary) is attributed to television exposure. When I heard most newspersons and actors speaking in a very clean, unaccented American way, I realized that this was the more proper way to speak. I realized that "Yall reckon we oughta" rather than "Do you think we should" for example, was going to mark me with a stigma when I came into contact with non-Tennesseeans. I would have never known the difference if not for Media showing me the less coloured way of speaking.