@cmcuk: I was asking myself the same question. My answer was that I wanted to test how much I tolerate some food with non-super-high GIs, once I’ve followed FTD long enough to be confident to do some more tests (I plan to write about my full story in a few weeks).
@Norm: If I may say so, as ingenious as it was of you to link FTD to the GI, we should not forget that the GI is only an auxiliary means. As you have also pointed out in your book, the whole story is about as complicated as there are different types of bacteria 😉 However, even if the GI is only a pretty rough tool, difficult to obtain and partly debatable, it seems to work rather well. Including us FTD folks. Thanks to you!