I ate the usual recommended high carb stuff pretty much my whole life until just a few years back. Now have T2 diabetes (which runs in family too). Also now eat very low carb. Can't bring my sugars all the way down to normal that way but just imagine how much worse my A1c's would be feeding loads of carbs into such a broken metabolic system. Blaming that gentleman's diabetes on his past three months of low carb diet makes about about as much sense as blaming recent smoking cessation as the cause of a cancer diagnosis.