There is one surprise about using a bit of potato starch in scrambled eggs; how much butter or other fat the eggs will hold. This, alone, is enough reason to use it.
After one week, I am not seeing any noticeable change in BG, but then I was using a bit of pan fried potatoes for breakfast quite often. It may be, therefore, I was getting the effect. I know that without those potatoes, I get hungry much sooner.
Be well, eat real food, breath deeply, smile easily, and enjoy what life has to offer. Daoish.