In the Q&A spirit, my question is: Who borked the stats?
It was meeeeeeeeeeeee!
A reference change to the underlying libraries didn't expose itself as an issue until the library that relied on it was called. As luck would have it, erroring requests in the multi-page fetcher were also swallowed (not intentionally). Silent fail FTW!
A fix has been deployed and stats should be updating properly now.
Fun fact: I don't have an Area 51 database locally. This fix brought to you by blind luck guesses and pushes to production for testing.
In the meantime, the figures on the site's home page look correct. The Stack Exchange site list also has a correct-looking figure for questions per day.
I wouldn't be sad to see those Area 51 figures go away altogether. If they're going to stay, please at least correct the goals. As it is now, each beta invariably has people who compulsively compare the current figures against the goals and obsess about them, instead of looking at the big picture.