I am a vegetarian, and I am relatively low carb. Bernstein recommends 6/12/12 = 30. I eat about 60 grams (net) per day. This is in line with the thinking of Atkins (diabetes); the Eades Protein Power approach, Rosedale, and South Beach.
I find that I can maintain an A1c of about 5.0 with no extreme highs or lows. I am currently phasing (slowly) off Januvia and take 2000mg of metformin/day. We will continue to reduce the meds if my A1c stays in place. (My doctor would be happy for me to stay around 5.5- I told her 5.0 is my more my style!).
I am a lacto-ovo vegetarian. I eat greek style low carb yogurt, Quorn protein, tofu, seitan, eggs (not many- I don't like the taste), cheese, nuts, lentils and most beans as my protein sources. That's one reason why my carbs tend to run higher than Bernstein levels. I also eat oats (steel cut oatmeal) and barley (in soups). I have had no difficulty eating the required amounts of proteins. Many days I eat more like a Bernstein low carber than the other approaches.
Hope this helps!
I just want to live happily ever after-every now and then. Jimmy Buffett