--that there is considerable evidence that neurological symptoms can present well before frank diabetes is diagnosed, while one is in the category of "impaired glucose tolerance" (and that many doctors are unaware of this evidence and think diabetic neuropathy only happens after many years of severe blood sugar dysregulation).

Don't have a lot of time this morning, but searching my name and posts here will bring up links to a LOT of papers and studies about this. It's certainly worth investigating.