 Shares of Darden Restaurants Inc. DRI, -1.11 dove 2.5 in premarket trading Thursday, after the restaurant chain operator matched fiscal first-quarter profit expectations but missed on same-store sales, amid weakness in its flagship Olive Garden and LongHorn Steakhouse chains. Net income for the quarter to Aug. 28 fell to 193.0 million, or 1.56 a share, from 230.9 million, or 1.75 a share, in the year-ago period, to match the FactSet consensus for earnings per share. 