Neither are cold, boiled potatoes - they’re a resistant ‘slow carb’ starch, for those who can’t deal with full low carb eating - or can’t live without potato salad, like me:
http://www.diabetesincontrol.com/cold-potatos-have-a-lower-glycemic-index/
Yes, that’s also in the link I posted. Best of all, I presume is boiled, waxy potatoes.