They must mostly live in the US NorthEast because EVERY senior I know in NY, CT, PA and WV has been diagnosed as pre-diabetic.
Prediabetes is still highly reversible, it only seems to persist because of reduced physical activity and insufficient concern with maintaining a diet relatively free of high-glycemic foods (white starch,white sugar), and including a higher-than-usual proportion of polyunsaturated fats (olive oil, for one) and balanced proteins.
Even modest weight loss and moderate exercise can reduce the HbA1c level down in the 5-6% level.
Eat mor chikin. On rye bread.
Thanks to the downgrading of blood sugar from 120 to 90s, half the country was converted to pre-diabetic.