Drink up friends, the wine is fine.
"Once sugar is produced, the cooler, wetter climate, a characteristic of Leelanau Peninsula terroir, sets this flavonoid, tannin, and other polyphenol metabolism in place. This is one reason for the great similarities of Michigan and that other 45th parallel location, Bourdeaux, France. It’s also verification of a statement made to me by Napa Valley winemaker, Scott Harvey, who feels that the Michigan flavonoids and turpines concentrations are of the highest in the world"
Via Forty-Five North Vineyard and Winery: Stain Less Tasting