Why do the Mannings sound like they have a Different accent ??

I grew up in New Orleans, but don't have the hardcore accent because my parents, who lived in N.O. for 34 years, were originally from North Louisiana -- my mother even had a countryish "twang." -- I live in North Louisiana and now when I go back home to N.O., friends tell me I have a bit of that "twang" too (but I don't hear it).

It's the people whose families have lived in New Orleans for generations that have that wonderful "Yat" accent.