This article's explanation is a little too curt. I think regional American accents at the time of the Revolution matched up better with certain regional British accents explains it a little better. For a more in depth study of not just accents, but the micro English speaking cultures that came to make up the United States I recommend "The Cousins' Wars: Religion, Politics, Civil Warfare, And The Triumph Of Anglo-America" by Kevin Phillips. http://www.amazon.com/Cousins-Wars-Religion-Politics-Anglo-A...