Emphasizing dialects in Northern England?

Right now, I am reading the book Cultures Collide: Managing Successfully Across Cultures by Richard Lewis (1996). In that book I read that Scots and Englishmen from Northern England, emphasize their dialects to be seen as more genuine, more sincere and warmly human. Do you agree with this?

As the link can tell you, there are new editions to this book, but I have only access to the one from 1996. As my copy is somewhat old, I wonder, if you find the use of dialects in the area different today?

:-)