Mid-Atlantic? Wikipedia says that applies to upper class types, film actors from decades ago and theater actors. It's very noticable to Americans when someone talks like, say Cary Grant.
Actual US middle atlantic region includes places like Baltimore, which has it's own accents.
Wikipedia calls the "no accent" I was referring to as "General American". It's commonly used by U.S. newscasters, and not as posh-sounding as Mid-Atlantic.
Enemy at the Gates had the Soviets with British accents, even Ron Perlman's character. It was strange, certain didn't help the movie.