  Varying the Standard Model (SM) fermion Yukawa couplings universally by a
generic positive scale factor ($F_{Yu}$), we study the phenomenological fit to
the current available experimental results for the Higgs boson search at hadron
colliders. We point out that the Higgs production cross section and its decay
branching ratio to $\gamma\gamma$ can be varied oppositely by $F_{Yu}$ to make
their product almost invariant. Thus, our scenario and the SM Higgs are
indistinguishable in the inclusive $H\to \gamma\gamma$ channel. The current
measurements on direct Yukawa coupling strength in the $H\to b\bar{b}/\tau\tau$
channel are not precise enough to fix the scale factor $F_{Yu}$. The most
promising is the vector-boson-fusion channel in which the CMS has already
observed possible suppression effect on the Yukawa couplings. Further more, the
global $\chi^2$ fit of the experimental data can get the optimal value by
introducing a suppression factor $F_{Yu}\sim1/2$ on the SM Yukawa couplings.
