  Recent experimental and numerical studies of the critical-temperature
exponent $\phi$ for the superfluid-Bose glass universality in three-dimensional
systems report strong violations of the key quantum critical relation,
$\phi=\nu z$, where $z$ and $\nu$ are the dynamic and correlation length
exponents, respectively, and question the fundamental concepts underlying
quantum critical phenomena. Using Monte Carlo simulations of the disordered
Bose-Hubbard model, we demonstrate that previous work on the
superfluid-to-normal fluid transition-temperature dependence on chemical
potential (or magnetic field, in spin systems), $T_c \propto
(\mu-\mu_c)^{\phi}$, was misinterpreting transient behavior on approach to the
fluctuation region with the genuine critical law. When the model parameters are
modified to have a broad quantum critical region, simulations of both quantum
and classical models reveal that the $\phi=\nu z$ law [with $\phi=2.7(2)$,
$z=3$, and $\nu = 0.88(5)$] holds true, resolving the $\phi$-exponent "crisis".
