Thank you for those who have tried to educate me on "Insulin resistance" and how you measure it. Seems that the answer is that it is not easy outside of a dedicated laboratory environment, and even then it is a very fuzzy concept when it comes to assigning a number to it.
So, where are we? There are two principal mechanisms for T2 diabetes.
First, for some reason or other the pancreas is producing insufficient insulin to handle the blood glucose rise after eating having caused abnormal peaks which take time to settle back to pre eating levels. Limiting carbohydrate intake is a way of dealing with this by reducing the burden on the pancreas.
Second, the pancreas produces sufficient insulin to deal with whatever glucose is produced by eating carbohydrate but for some reason or other the processes whereby glucose is absorbed from blood into the body in general is impaired. In this case, the limiting carbohydrate may not be as effective in reducing blood glucose levels.
In between those extremes there is a whole heap of other stuff going on. It is complicated. Outside of a laboratory we can only really measure blood glucose and the noise associated those measurements is pretty loud. There may be signals in that noise but they are well hidden.
My thought for you
@beating_my_betes is that if you reduce your blood glucose levels by losing weight through calorie restriction without carbohydrate reduction you will not be able to assign that to reducing insulin resistance. It maybe the case but there are other competing mechanisms that you cannot rule out.
Yes, I did make the observation that analysis of data from T1's might help with understanding mechanisms because at least there is control of one major variable, the amount of insulin being introduced into the system. You don't have that when it comes to T2.
Another thought for you
@beating_my_betes. Your start position as stated in another thread suggests that you need, with some urgency, to get your weight down. In your position I would stop fretting about mechanisms and experiments and focus on achieving weight reduction by whatever means works for you. It is highly probable that would go a long way to getting control over your BG and BP with the benefits that would give whatever the mechanism.