Are the setting and characters in A Streetcar Named Desire realistic?

In the opening scenes of A Streetcar Named Desire, the setting and characters are portrayed as realistic.  At the beginning of the play, Blanche arrives to visit her sister Stella and her husband Stanley.  The area in New Orleans is much differnent from the sisters' home Belle Reve--the houses are quaint and the area is characterized by the blues music emanating from clubs. Stella and Stanley live in a small apartment, and Blanche criticizes her sister's way of life.  Blanche claims to be used to a finer lifestyle, and this sets up the initial clash between the characters.  Later, Stanley's brash ways serve as another clash between him and Blanche.  These elements make the setting and characters realistic.