This isn't entirely snarky. The ACCORD trial was a spectacular failure (http://www.nejm.org/doi/full/10.1056/NEJMoa0802743). Nobody really knows why (as far as I know), but since high blood glucose is known to cause problems, and lowering it by giving extra insulin does not seem to help (remember that type-2's usually have high spectacularly insulin levels to begin with), we've got to consider other approaches.

Avoiding carbs seems to both normalize glucose and lower insulin in type-2s, so it's not a dumb approach. On the other hand, a low carb diet tends to increase insulin resistance, so if it turns out that both the glycemia and insulin levels are not the cause of the adverse symptoms, but rather symptoms in themselves, going low carb may make everything much worse. (e.g. it might make the numbers we can measure look better, while worsening whatever metabolic abnormality is causing the diabetes in the first place)

Not sure why you're being downvoted. This is a perfectly valid approach to managing type 2 diabetes.

My mother is a type 2 diabetic and has been on a diet in which she consumes less than 30 grams of carbohydrates every day. To put that in perspective, the recommended daily consumption of carbohydrates is about 300 grams. The vast majority of American adults consume more (sometimes much more).

She cannot eat bread, pasta, fruit, potatoes, or even carrots, among other things. Surprisingly, some forms of sugar substitutes can also raise blood glucose levels. But she can eat many kinds of vegetables, meat, eggs, and dairy products. Just no sugar, and no carbs.

The diet has been very successful. She barely needs insulin anymore, and she's at the lowest A1C level she's ever had -- even lower than when she was taking lots of insulin. As a bonus, she's returned to a healthy weight.