It could still turn out not to exist, yes, but it is not very likely in my opinion. They are seeing signals (albeit very small) in multiple search channels in multiple detectors in the same place. It would be a pretty large coincidence for this to occur under the background-only model, or a really unfortunate and strange screwup in the background modelling.
It may turn out to not quite have the correct properties for a Standard Model Higgs, in fact there is already minor evidence that some of the branching ratios are not quite right (but this could easily go away with more data). So I don't know if I would bet on it being exactly Standard Model like, but it seems close, and I would stick my money on them having something rather than nothing.