  The authors of a recent paper [Phys. Rev. Lett. 113, 120404 (2014)] suggest
that "weak values are not inherently quantum but rather a purely statistical
feature of pre- and postselection with disturbance". We argue that this claim
is erroneous, since such values require averaging with distributions which
change sign. This type of averaging arises naturally in quantum mechanics, but
may not occur in classical statistics.
