Generally autoupdates are received within a few hours of pushing them out.
The most recent version wasn't actually pushed to the auto-updater because the nature of the changes:
Update signing certificate on Mac installers - Only affects new installs
Update Facebook integration to use a more recent Graph API version endpoint - Is just some proactive housekeeping, but doesn't actually have any affect at the moment.
We planned on waiting until another update before pushing to the autoupdater.
Apologies for the confusion.