  Current CERN Large Hadron Collider data on the 126 GeV standard model-like
Higgs boson suggest the possibility of larger Higgs boson couplings with the
weak gauge bosons, $g_{hVV}$, than those in the standard model. We use the
Georgi-Machacek model as an explicit model to realize such a scenario. We find
that the $g_{hVV}$ couplings can be larger than the standard model value by a
factor of about 1.3 maximally in the parameter region consistent with the
current Higgs boson search data and allowed by various other constraints. We
then show how the modified $g_{hVV}$ couplings lead to enhancements in various
weak boson scattering processes. This can be clearly observed as excesses in
the transverse mass distributions at around 126 GeV and also the mass of heavy
Higgs bosons.
