Shares of Brinker International (EAT) have been strong performers lately, with the stock up 19.9% over the past month. The stock hit a new 52-week high of $46.12 in the previous session. Brinker International has gained 6.1% since the start of the year compared to the 6.2% move for the Zacks Retail-Wholesale sector and the 1.4% return for the Zacks Retail - Restaurants industry.What's Driving the Outperformance?The stock has an impressive record of positive earnings surprises, as it hasn't missed our earni ...