  I compare the tree level estimate of the electro-weak precision parameters in
two (exactly solvable) toy models of dynamical symmetry breaking in which the
strong dynamics is assumed to be described by a five-dimensional (weakly
coupled) gravity dual. I discuss the effect of brane-localized kinetic terms,
their use as regulators for the couplings of otherwise non-normalizable modes,
and the impact of a large deviation from its natural value for the scaling
dimension of the background field responsible for spontaneous symmetry
breaking. The latter is assumed to model the effects of walking dynamics, i.e.
of a large anomalous dimension of the chiral condensate, it has a strong impact
of the spectrum of spin-1 fields and, as a consequence, on the electro-weak
precision parameters. The main conclusion is that models of dynamical symmetry
breaking based on a large-Nc strongly interacting SU(Nc) gauge theory are
compatible with precision electro-weak constraints, and produce a very
distinctive signature testable at the LHC. Some of the considerations discussed
are directly relevant for analogous models in the context of AdS-QCD.
