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Chicken-wing specialist Buffalo Wild Wings Grill & Bar drove its estimated sales per unit up nearly 10 percent, the highest gain of all chains in the Casual-Dining category.

U.S. systemwide sales growth: 20.8%
U.S. systemwide sales: $2.5 billion
Top 100 sales rank: 24
U.S. unit count: 884 (up 8.7%)
ESPU: $2.9 million (up 9.9%)