Yes, the evidence of increased risk for diabetes with age is fairly well shown by data, however the relationship between mortality and diabetes at older age indeed not yet we'll supported.
Southeast Asian populations have a lower tolerance to changes in glycemia at younger ages.
Interesting, any thoughts or knowledge from research as to why this might be?
Generalizing is quite complex without being precise.
Generalizing is never precise.
Well, as I see it In mathematics generalizing is exact and in physics, precision allows generalization, as it deals with measurements. Of course, I can be wrong.
About Southeast Asian populations. On average, is due to low muscle mass and higher abdominal fat. This leads to insulin resistance more easily.
The Ethno-phenotypical traits are thought to have been selected for cold climates where fat based diets are preferred.
http://asiandiabetesprevention.org/what-is-diabetes/why-are-asians-higher-risk