Re GI and II stuff – they are the values for food on their own. I’ve just found an interesting paper which shows that meals – i.e. how we actually eat – and combinations of different foods will change GI and II values. I’m not going to read it all, but this stood out in my skim:
“The GI differences observed may be particularly due to fiber content of the meals, as foos with high-fiber content (beans, lentils) have a lower GI.”
It goes on to talk about all kinds of complex stuff. You can (i think) read it here: http://www.ajcn.org/content/45/3/588.full.pdf
Here is a nice chart from the paper:
As you can see, when combined with other foods, certain foodstuff greatly increase the insulin index of the whole meal. These are foods not allowed 6 days a week in the iDave diet.