Last week, we reported how for many normal sites, the cache date listed in the Google Cache results, was a month or so old.
That continued like that until this morning, when I noticed the cache date is now showing only a few days back for basic static looking sites. Of course, with sites that are updated often, such as this site, the cache date was pretty recent. But for normal sites, the cache date was dated in October.
Google is now showing me a cache date of November 30th, which is normal.
Google's John Mueller said back then that "the cached date is separate of crawling & indexing, so I wouldn't use that as a metric." Later on he added on Twitter that "It'll catch (cache?) up again, don't worry."
Forum discussion at Twitter.