I'd heard that New Orleans residents are more New York- than Southern-sounding. Recently, I saw some of the Khan Academy videos, and noticed that Salman Khan, who, as Wikipedia says, is from New Orleans, does not sound even remotely Southern. Is this the typical New Orleans accent? Here's one of his videos.
I'll agree that he doesn't sound remotely Southern, nor does he have a New Orleans accent.
Khan's accent is fairly neutral to these Midwestern ears.
Well, if we are going by famous people the best matches for a New Orleans accent would actually be Emeril Lagasse or Winton Marsalis. They definitely speak New Orleans’s accent and yes, that dialect does have things in common with a NYC accent, such as replacing th at the beginning of a word with the letter d. ( "These," "Them," and "Those" become "Dese," ”Dem," and "Dose”.) The reason for this has to do with the original settlers of these cities, the Dutch and the French, the people who would go on to influence the accent. Neither the Dutch nor the French language have a dental fricative th and so naturally when a native speaker of either tongue tries to pronounce it it usually comes out as a d sound. So today, New Orleans can sound quite like New York.