I may have made these comments in the other thread, but I would like to make these observations.
The test subjects they started with were very poorly controlled type II diabetics and looking at what the night club bouncer was eating (they showed him eating the biggest burger and fries I've ever seen), no surprise.
They stopped taking their medication as soon as they started on the shakes, they took their HbA1c, but didn't then monitor their BG. They took their HbA1c again at the end of the 8 weeks.
They all achieved good results at the end of the 8 weeks. As the HbA1c represents a sort of average over the previous 8 to 12 weeks, then their BG must have improved straight away as a result of much lower carb intake (some shakes are about 40 gms carb). Not due to the weight loss which no doubt is good for their health, but not the reason for their much improved BG.
Obviously they will have to continue with a diet containing less carbs, they didn't emphasise that enough.