Let's get things straightened out. About a month ago the CDF experiment at the Tevatron at Fermilab found a "bump" in their data. It was statistically significant and was unexplained. This "bump" cannot be the Higgs boson from The Standard Model because it has the completely wrong cross-section. This was a fully public result from the CDF experiment.
About the same time there was a "leaked" abstract from an internal note from the ATLAS experiment at the LHC which claimed to have a signal for a Higgs boson. This was never a public or published result.
Now today we have an announcement from the D0 experiment at the Tevatron that they looked into the CDF bump and see nothing. This isn't a set back for the Higgs since it was never about the Higgs. The ATLAS leaked abstract has never been confirmed even by ATLAS so lets not get our underpants in a knot. Lets also not conflate the two since they don't have anything to do with each other.