It may be, as the principle still applies. It'd interesting to contemplate that the "pivotal" mutation may have been something as subtle as a taste preference

It may be, as the principle still applies. It'd interesting to contemplate that the "pivotal" mutation may have been something as subtle as a taste preference that lead to the consumption of the "spoiled" food caches, and the resulting surplus of energy. Of course, for that to be the case we'd have been caching food because of some previous mutation, and back and back we go...