This is an old thread but just sharing my experience with lentils. I ate about 160 grams of cooked lentil and needle didnt move at 1,2 and 3 hours. Started at 5.5 and it stayed there which is VERY unusual as if i eat a bite of whole wheat bread, i will go to 7 in an hour and some time stay there for couple of hours, so it was surprising why lentil didnt move my GB at all. That was cooked black lentils.