Adam, not sure that I agree completely with that statement. I know that you're basing your supposition on heresay (one of my favorite tactics) but I think that they made some good choices.
To me that there are two statuses (stati?): linksland and seaside course. The Koehlers, Fishers, Pebbles, Maidstones and Kiawahs in the USA have the latter, while Sand Hills, Prairie Dunes, et al., have the former. Neither qualified into this book. Many will object to Kinsbarns' inclusion into the book. A cynical parcel will suggest that there's economics afoot here; else, why include the Keiser Coterie of BDx3, Cabot and the Tasmanian Devils, at the exclusion of the sandbelt courses near Melbourne?
I think it's important to not take the book too seriously. It is the opinion of two men with enormous publishing clout and connections and is probably 90% accurate. Since lives are not at stake, that's a decent percentage. Ultimately, the duo decided on three qualifiers for inclusion: terrain, turf and weather (subdividing each into final qualifying points.) They narrowed their choice nearly in half, from the 400s to around 250.
By the way, one space or two after periods these days? Anyone?