insulin is released in response to all carbs (except veggies). even so caqlled "good carbs" like oatmeal, brown ricee, whole wheat bread, sweet potatoe...etc. they all still make your body release insulin.
when insulin is present in the body at levels above what is normal, your body doesnt burn fat.
BUT the amount of time insulin is released in response to a meal is nto that long. so eating carbs doesnt mean your body doesnt burn fat, because eatign carbs doesnt mean insulin is raised all day.
high glycemic, faster digesting carbs would be superior to slower digesting carbs when dieting, beause the faster a carb digests, the higher it gets insulin, the quicker the carbs are stuffed into muscle, and the faster insulin levels fall back down to a level where fat loss is possible. not only that, but fast carbs cause such a high raise in insulin, the it causes a touch of hypoglycemia....which means you get a consequential big fall in insulin, down below what is normally ..which causes a a big gh release and lots of fat loss.