Film festival toasts Napa Valley wine history

A controversial film based on an infamous Paris wine-tasting event that embarrassed France's top experts was uncorked at the Sundance film festival this week.

But long before its premiere, a key character in the true story said to have spurred New World wines toppling France's wine supremacy has been severely critical of the film's historical accuracy.

"Bottle Shock" by director Randall Miller revisits a 1976 blind tasting in which French experts hailed California wines over some of France's finest vintages.