  While the PAMELA collaboration has recently confirmed the cosmic ray positron
excess, it is interesting to review the effects of dark matter (DM) subhalos on
the predicted antimatter signals. We recall that, according to general subhalo
properties as inferred from theoretical cosmology, and for DM with constant
annihilation cross section, the enhancement cannot be $\gtrsim$ 20 for the
antimatter yield. This bound is obviously different from that found for
gamma-rays. We also recall some predictions for supersymmetric benchmark models
observable at the LHC and derived in the cosmological N-body framework,
illustrating in the meantime the existing discrepancy between the profiles
derived from N-body experiments and the current observations of the Milky Way.
