  We demonstrate that discrepancies between predicted low-energy quasiparticle
properties in disordered 2D d-wave superconductors occur because of the
unanticipated importance of disorder model details and normal-state
particle-hole symmetry. This conclusion follows from numerically exact
evaluations of the quasiparticle density-of-states predicted by the
Bogoliubov-deGennes (BdG) mean field equations for both binary alloy and random
site energy disorder models. For the realistic case, which is best described by
a binary alloy model without particle-hole symmetry, we predict
density-of-states suppression below an energy scale which appears to be
correlated with the corresponding single-impurity resonance.
