  We provide a quantitative determination of the effective partonic kinematics
for Higgs production in gluon fusion in terms of the collider energy at the
LHC. We use the result to assess, as a function of the Higgs mass, whether the
large top mass approximation is adequate and whether Sudakov resummation is
advantageous. We argue that our results hold to all perturbative orders. Based
on it, we conclude that the full inclusion of finite top mass corrections is
likely to be important for accurate phenomenology for a light Higgs with m_H ~
125 GeV at the LHC with sqrt{s} = 14 TeV.
