  Using the updated proton and helium fluxes just released by the AMS-02
experiment we reevaluate the secondary astrophysical antiproton to proton ratio
and its uncertainties, and compare it with the ratio preliminarly reported by
AMS-02. We find no unambiguous evidence for a significant excess with respect
to expectations. Yet, some preference for a flatter energy dependence of the
diffusion coefficient starts to emerge. Also, we provide a first assessment of
the room left for exotic components such as Galactic Dark Matter annihilation
or decay, deriving new stringent constraints.
