(NBBJ) - Luxury-brand sales ‘a real turnaround for the industry'. Even as Treasury Wine Estates’ Napa-based Beringer brand group prepares to launch a mass-market brand this spring targeted at Millennial generation female consumers, the Australian company’s higher-end North Coast brands are enjoying a sales rebound. Treasury earlier this month reported that sales volume for St. Helena-based Beringer Vineyards and Kenwood-based Chateau St. Jean in the second half of 2011 were key to stabilizing unit sales in the Americas after slumping in recent years. Yet, more expensive wines from Beringer are selling quickly, Chateau St. Jean enjoyed first-half unit sales growth of 30 percent, and volume at Stags’ Leap Winery in Napa Valley and Etude in the Napa side of Los Carneros winegrowing district both enjoyed double-digit sales growth, according to Stephen Brauer, managing director of the Beringer Business Unit.