I too think that T2 diabetes can be reversed (others prefer the words "remission" or "controlled") and have seen my husband reverse his blood sugar levels from dangerously high to absolutely normal (where they still are two and a half years later) over the course of nine days. Hba1c, of course, took a little longer. General feeling of health, energy, well being came about gradually over a few weeks. Retinopathy took 18 months to sort itself out and reach a steady state. There are many aspects to diabetes and diabetic damage, some take longer than others to recover or reverse.
And how did this miracle happen: Low carb, what else.
Sally