That wine snob saying, “Life is too short to drink cheap wine,” has not reached the millions of consumers who buy at Wal-Mart. According to speakers at the recent Unified Wine and Grape Symposium in Sacramento, Calif., Oak Leaf Wines, which run $1.99 a bottle (California store price), may be the fastest-growing wine in the United States today. Nor has wine-snobism affected the early-adopter young consumer group who seem largely responsible for pushing 3-liter wine box sales up 29 percent in 2007.