The LA Philharmonic apparently hired its new music director, Gustavo Dudamel, right out from under the nose of the Chicago Symphony, where the young Venezuelan appeared last week as a guest conductor. “[Chicago’s] backstage was jumping with well-wishers, agents, heads of other orchestras and the CSO’s own musicians as it hadn’t since Daniel Barenboim’s farewell concerts or Georg Solti’s retirement as music director. The Internet was abuzz and speculation was rife that the CSO might be able to work out some arrangement with Dudamel.”