So, out of curiosity, I looked up your summarization and found it to be quite an accurate representation of the text on pages 121-122 in GRIERSON'S RAID.
In Brown's "Notes" section, on page 248, he (Brown) references "Bettersworth, pp. 202-204, 225-28" as the source of his Piney Woods characterization.
In reviewing those pages in CONFEDERATE MISSISSIPPI, I see no such characterization of the Pineywoodsman or the Pineywoods as Brown claims to have found on the referenced pages. Brown's quotation appears to me to be a figment of his own imagination, leaving me to wonder what might his motives have been for the characterization he included in GRIERSON'S RAID - if CONFEDERATE MISSISSIPPI was his only source as stated in his "Notes?"
I found Bettersworth to be much more complimentary when describing the Piney Woods and Pineywoodsmen. Do you feel the same way and might my conclusion mirror your own and be the reason why you posted this in the first place?