CMS and ATLAS will do an official combination. For example, it was done for 2011: http://arxiv.org/abs/1202.1488.
"In this Letter, we report on the combination of Higgs boson searches carried out in proton-proton collisions at Sqrt[s] = 7 TeV using the Compact Muon Solenoid (CMS) detector at the LHC. ... Combined results are reported from searches for the SM Higgs boson in proton-proton collisions at Sqrt[s] = 7TeV in five Higgs boson decay modes: gg, bb, tt, WW, and ZZ."