Thank you all for your thoughtful and informative replies.
So my husband went to see his doctor last night, and his reaction to the results was very positive. He pointed out the fact that when my husband had the 5.4 ac1 in January, he was 15 pounds heavier than now, and he thought that if he had stayed on the Metmorfin his BG might have dropped too much. He also thought that 6.5 is a good reading, (I can tell he doesn't hang around the low carb forums ) and in view of that and the excellent cholesterol and blood pressure (which was in the low range of normal) tests, we should continue on as we have been doing.
Soooo... You have to realize that this is a French family doctor in a small village not some high flying New York endo! Taking everything on board that I've learned here I've decided that I would be very happy if husband could get a 5.5 ac1. Why that number? First of all, I've been studying the eAG chart (thank you AlwaysAgnes) and based on the non-diabetic readings of myself and my healthy teenagers, I feel that if we had an ac1 done it would be around 5.5. I base this on fact is that we have resting blood sugars of around 90, and spike up to 125-130 after healthy carb meals (veggies, whole grains, legumes). If I look at the chart I think our average would be 5.5, and I don't think we could have a lower ac1 eating the way we do. I realize that a lot of high fat/low carbers go for even tighter control, but I can hardly expect him to have a lower ac1 than the non-diabetics. And as long as his overall health remains excellent, (cholesterol, blood pressure, sense of well being) I would be pleased to reach a goal of 5.5.
Now the question is, can we do it without drugs or without giving him traditional high fat foods like meat, dairy and eggs? I don't ever want him on any drugs again, I'd rather force feed him a steak first! I'm still hopeful that we can, for a few reasons. First of all, my husband's weight has dropped again, I thought he was at his set weight but apparently not. As of this morning he is now 5'9" 154 pounds (180 cm/69.9 kg), which gives him a BMI of 21.6 which isn't that low. I would like to see him at 21, which would make him really slender. He looks slim, but still has a little flab around his tummy, I can't decide if it's from 15 years of wearing a pot belly or fat. In any case, he's starting to add abdomen exercises to his workout, right now he rides a stationary bike. So we'll be testing the Barnard theory that fat increases resistance to insulin.
The other thing is that we've only started testing his blood glucose regularly a few weeks ago, and until then his daily breakfast was rolled oats with milk, which I now know spikes him to 200. I was also giving him a lot of potatos with a similar result. That won't be happening anymore. I'm confident that with the knowledge we now have, I won't have any problem keeping his bg under 140. Hopefully one day in the near future his insulin sensitivity will improve and he can join in with the rest of the family when we eat potatoes which he loves. Luckily he always hated oats so that works out well
I've also noticed in the last week that his bg between meals is getting lower, it's consistently under 100 now, where it used to be 110-120. These are still relatively early days for him, and after having basically poorly controlled diabetes for 15 years, it's not going to get back to normal in a few months. I'm an excellent cook, and there are a lot of carbs that he handles very well, so for the time being we are going to keep on testing, and keep the bad carbs away. I actually googled low-carb vegan diet and was surprised to see quite a lot of info out there on it. We are not alone!
Again thanks for all the feed-back, and the information. I'll keep you updated.