it is hard to know how someone on a low to zero added fat and no dairy, but high plant food diet with some starches is likely to react to occasional higher numbers.
That is it in a nut shell. It is likely that you get a lot of protection from the quality of your diet. I am not diabetic but even so, my approach is to try to go for as safe as possible and eliminate as much uncertainty as I can. To me that means trying to keep blood sugars below 140 at all time. There is research out there...managed to dig up a list here
The studies you will read below, some of which are not cited in the AACE guidelines, make a cogent case that post-meal blood sugars of 140 mg/dl (7.8 mmol/L) and higher and fasting blood sugars over 100 mg/dl (5.6 mmol/L) cause permanent organ damage and cause diabetes to progress.