I think the culprit is chocolate biscuits, ice cream, pies and cakes, not natural high fibre carbs. Tsimane and Okinawans both eat lots of sweet potatoes, and generally only real foods, not manufactured baked goods..[/QUOTE
I agree completely that until one develops carb intolerance as a result of manufactured foods, one can probably eat real food carbs without any great problems . This probably means that following a high carb diet of natural foods is perfectly fine for most.
Once the carb intolerance has developed for whatever reason then no matter who you are or what type of carbs - they still need to be reduced.
I don't particularly buy that its the act of then not eating meats that makes much difference to health. Instead its the infiltration of the western diet- om 6 and processed that causes the problems.