I am also not a low-carber, but like many others I have found that I needed to reduce the carbs in my diet. As many others have reported, at diagnosis I was told I could be "diet controlled" and was given the standard eat plenty of starchy carbs advice. At first I couldn't understand why my BS levels continued to rise, so did a lot of studying and research and came to the rather obvious conclusion that more carb = more BS, less carb = less BS. Not exactly rocket science but certainly a revelation to me.
Once I became aware of the affects that carbs have on my blood sugar and cholesterol levels, not to mention mood and energy, I started experimenting and have arrived at what for me is an optimum diet of around 100-120g carbs per day. This allows me to maintain my BS at the high-end of the non-diabetic range, maintain cholesterol at just above 4, and doesn't leave me feeling deprived of anything. I know that I can allow myself an occasional treat without blowing all the good work out of the water. And after all, if you have that treat every day, it is no longer a treat but a staple part of your diet!
Although I was diagnosed 7 years ago, I suspect that I had slowly progressing type 2 diabetes for many years before that because I now feel fitter and have more energy and stamina than I had 20 years ago.