Something did happen but gut feeling tells me they had been changing something to keep us all on our toes,yet again.
I can confirm the same on all 43 sites in WMT. I can confirm that the data is bogus too. All my third-party tools report no changes. I see no traffic changes. Also my stats usually update every 24 hours. My stats haven't updated in 72 hours in WMT.
I am not see that, but I can fee Google did some big changes that will involve plenty of site by profile link building.