THE ESSENCE: Since opening in 1998, the U.S. outpost of London-based Bartle Bogle Hegarty in New York has struggled with consistent, high-level performance. But in 2005, the agency hit its stride. The U.S. team was a key player in winning important clients for the micro-network; it also released work with a unique sensibility. N.Y. Chairman Cindy Gallop resigned, replaced by industry vet Steve Harty, formerly of Merkley Newman Harty and the short-lived Interpublic Group of Cos. venture Lowe & Draft. BBH had no losses and says its yearly billings were up 10%.