Aiming for normal levels is the obvious goal for any diabetic but no diabetic can do that safely without a CGM to tell them they are not suffering regular episodes of hypo’s. Without that evidence, then I would argue that sustained HbA1c levels of 5.4-5.7% would only be achieved through numerous hypo’s. Near normal readings suggest that BG levels are almost never raised for prolonged periods of time leading to glycosylation which simply flies in the face of what diabetes is and does.
In the first two years after diagnosis I was never above 6.3% and I know I suffered regular hypo's.
I guess it depends on much you test each day. If you test 3 times daily, then yes, you will be missing massive chunks of your day, and a hypo/hyper can easily result.
I was told when i was diagnosed (yes, here in Canada) that i had to keep my Pre-meal level <5.5mmol/L and 2 hours after every meal i had to check and make sure that it was below 7.8mmol/L, as well as keeping my waking test below 6mmol/L and my before test below 6.5mmol/L
Those were the doctors orders right in the ER before they released me, and they have stuck with that on every appointment. They gave me the long 'complications' speech, wrote this all down for me, gave me her number and sent me on my way with my glucometer and MDI.
I have yet to have a hypo in which i have felt 'bad' - have had 'lows' in which i had symptoms to warn me, but never anything beyond that.
As someone pointed out - low carb has SIGNIFICANTLY helped maintain a flat profile all day, without deviating below 4, or above 8. at thats only at 30g per meal, some people go much lower and see even better results.
I really feel that the treatment for T1D should be insulin, low carb, exercise.