Thoughts on the American Accent?

I have often wondered if the American accent isn’t the collective English accent of the world. I do not mean this in the “Oh, America is so awesome! Our way is the best way!”

What I mean is, we are the “melting pot,” after all, and our accent developed over time through input from all nationalities. When the accents of British, French, Mexican, Japanese, Russian, Indian, and all other people from around the world speak in English around each other to the point where they lose their identifiable accent, is “American” the resulting blend?