Yep. My highest ever blood sugar was 8.2. I am tall and quite muscular but not fat and was told by 3 different people that my BMI was "obese". They tried to put me straight on metformin and when I said that I wanted to try diet control they told me I couldn't see the dietician until 2/52 after my due date.
When I pointed out that metformin is not licensed for use in pregnancy they got all shifty and suddenly a dietician appointment "became available" within the week. On the diet my BS stayed below 8 for the entirety of my pregnancy.
I got the strong impression that I was being, ahem, misdirected throughout, and unfortunately for them I have a decent working knowledge of diabetes. When I questioned the information I was given I noted an immediate change of emphasis from wafty statements loosely based on fact absolute bullshit to verifiable facts.
Of the others I know one is a consultant in a related field, unbeknownst to those testing her. Her post GTT glucose was 6.3. She was told that this was "massively high" and that she would need insulin.
Her response was best described as scathing.
All in the same NHS trust. If I didn't know it was ridiculously unethical and wrong I would assume we had been railroaded into some form of clinical trial. 
Anyway, that's my gestational diabetes rant. As a result of their decisions I was given a membrane sweep at 36 weeks and had a lengthy failed induction resulting in EMCS at 40 weeks. I have dealt with all that now, but if I have another, rest assured I will be ready for them.