This absolutely fascinated me, after reading it slowly once or twice

The idea that the lower GI of a food isn't due so much to blood sugar rising less slowly, but by that foods ability to more rapidly spike insulin and get blood sugar down seems to have a million possible implications. Thoughts and comments from those more adept at nutritional science than me appreciated!
http://www.ajcn.org/cgi/content/full/78/4/742