As mentioned in response to the other comment here, I was in error to use the term "bfcache". Yes, servers cache AJAX calls, this is described under the section

As mentioned in response to the other comment here, I was in error to use the term "bfcache". Yes, servers cache AJAX calls, this is described under the section "In practice" and there is a link to a server that can you use to replicate the behavior locally, probably in Chrome.