Accents in TWWLN

Although the young gentlemen of the Beargarden sounded spot on (imagine a young Harold Macmillan), I suspected Ruby Ruggles and John Crumb spoke generic yokel, only how would I know what East Anglian peasants sound like? So I was pretty smug to to read in the Chronology, Topography, and Dialect section of my book that I was right :coolgleamA: John Sutherland says the Norfolk-Suffolk speech of Ruggles and Crumb was abysmal. He says Dickens reproduced those speech patterns much better in David Copperfield, which, coincidentally, was the previous classic I read.