  We present a phenomenological study of the current status of the application
of our approach of {\it exact} amplitude-based resummation in quantum field
theory to precision QCD calculations, by realistic MC event generator methods,
as needed for precision LHC physics. We discuss recent results as they relate
to the interplay of the attendant IR-Improved DGLAP-CS theory of one of us and
the precision of exact NLO matrix-element matched parton shower MC's in the
Herwig6.5 environment as determined by comparison to recent LHC experimental
observations on single heavy gauge boson production and decay. The level of
agreement between the new theory and the data continues to be a reason for
optimism. In the spirit of completeness, we discuss as well other approaches to
the same theoretical predictions that we make here from the standpoint of
physical precision with an eye toward the (sub-)1% QCD \otimes EW total
theoretical precision regime for LHC physics.
