Right, high WBC was associated with Pima Indians and diabetes. It can be a marker for diabetes but has more to do with fighting infections rather than for diagnosing diabetes. If your WBC is glycated [has glucose attached] it can't fight infection as well as an unglycated cell.
well, according to the American diabetes Association..yes
High White Blood Cell Count Is Associated With a Worsening of Insulin Sensitivity and Predicts the Development of Type 2 Diabetes