when you say spike by what sort of amount would you call spike? From what I've read on the d,uk site as long as your 2hr is 8.5 or below your ok or 9 for T1.
8.5 is way too high. I used to aim at below 7.0
The NHS pushed a 'eat healthy carbs' diet primarily because they were worried about people eating too much fat and having high cholesterol and also because they believed that diabetes is a progressive disease and that it was inevitavbly going to get worse and you would end up, at some time in the future, on insulin. Keeping your two hour upper limit to 8.5 was seen as good.
But, as Roy Taylor pointed out:
"The Belfast diet study provides an example of moderate weight loss leading to reasonably controlled, yet persistent diabetes. This study showed that a mean weight loss of 11 kg decreased fasting blood glucose levels from 10.4 to 7.0 mmol/L but that this abnormal level presaged the all-too-familiar deterioration of control".
Now, that is fasting (12 hour) blood glucose, not two hour postprandial blood glucose but if you aim at 7 two hours after a meal, in time, you will find your fasting levels, or early morning levels, below 6 or even near 5.
As Taylor points out:
"The extent of weight loss required to reverse type 2 diabetes is much greater than conventionally advised. A clear distinction must be made between weight loss that improves glucose control but leaves blood glucose levels abnormal and weight loss of sufficient degree to normalize pancreatic function."