  Recently it has been proposed, in the context of experiments designed to
resolve the neutrino mass hierarchy, to use the average posterior probability
of one of the hypotheses as a measure of sensitivity of future experiments.
This has led to sensitivity estimates that are drastically lower than common
conventions. We point to the fact that such estimates can be severely
misleading: the probability that an experiment would actually produce a result
similar to the average value can be in fact negligibly small. We emphasize
again the simple relation between median significance and the likelihood ratio
evaluated with the ``Asimov'' data set, which can be used to express
experimental sensitivity in Bayesian terms as well.
