  Dynamic AdS/QCD is a modification of AdS/QCD that includes the running of the
anomalous dimension of the q-bar q quark bilinear and in which the generation
of the constituent quark mass plays the role of an IR wall. The model allows
one to move away smoothly from the controlled spectrum of the N=2 super
Yang-Mills theory of the D3/probe-D7 system to more QCD-like theories with
chiral symmetry breaking. We investigate soft wall behaviour in the model that
gives Regge trajectories with M_{n,s}^2 ~ n,s. To achieve these behaviours
requires the quark's constituent mass to fall peculiarly sharply in the IR so
that meson physics is sensitive to RG scales well below the quark's on-shell
mass. Including soft wall behaviour in models of walking gauge dynamics breaks
the near conformal symmetry which is present above the quark on-shell mass
which can generate a large mass for the techni-dilaton like state. We conclude
that the meson spectrum is rather sensitive to the IR decoupling.
