Not sure about these numbers, but.. yes, in general browser disk caches are not nearly as effective as people imagine.
Even jQuery from the Google CDN is rarely present in a cache. They are great for navigating around the same site in one session, but not effective for much more than that.
Even jQuery from the Google CDN is rarely present in a cache. They are great for navigating around the same site in one session, but not effective for much more than that.