No activity on homepage for most of day then floods of articles

Hi guys, Has anyone else noticed this? In the last week, it seems that nothing new appears on the hompage for most of my day (EDT), then all of a sudden there are a couple of dozen new articles. Is this just a change in posting behaviour by staff or some kind of bug? One key example is Paul's summing up of Offline. It's not even on the homepage as I see it at 12:09 EDT... and it was posted to FB over an hour ago! Cheers, Mark