Karyl Lee -- I like to think you are quite right.
I found out I had relatively mild, or pre-diabetes, in 2008. I went into a flat spin, haunted the Internet, got totally confused ...
In the end I worked it all out for myself, disregarding the stupid diet suggested by a dietician. ...
I cut out all "white" foods, especially bread. In the beginning I also cut out potatoes. Because I was so upset (we are in general a very healthy family, all relatives included!) I also lost some appetite.
I dropped a lot of weight in a short time (NOT a good idea -- it affects a woman's skin and general muscle tone).
(Sorry about all the "I's" !!

) I ate -- and am still eating -- a high-protein diet. I did not cut out any fats of any description, because you cannot cut out so much carbs PLUS fats, as you get desperately hungry.
In about 6 weeks I lost 15 - 17 kg (about 35 lbs, too much for me). But I started feeling great, I had much more energy, and my blood sugar dropped way down.
Last time I had blood work done, everything was just fine, including cholestrol and triglycerides, regardless of our fairly high-fat diet. (I am overdue for the next lot of tests).
I still eat no more than maybe 1 slice of bread per week. I do eat potatoes, in moderation, and I try to cook baby potatoes which have very little starch. (I have to "get around" my husband, who prefers his South African diet of meat and starches!!)
Since beginning 2008 my weight has been the same -- normal. At my age I don't want to lose any weight ... doesn't look good!
But I am soooo convinced that grains are (at least for some of us) simply baaaad. I do use a crackly, sorta-expanded type of crispbread on which I pile nice fillings, for breakfast. I eat a lot of cheese, meats, poultry, fish and lots of fresh veggies and salads.
If I eat "white food", e g a sandwich, my blood glucose shoots up. Nuff said.