Forum Moderators: open
Each of the many many many datacentres needs to be updated.
Everytime you search on google your reply may come from a different datacentre.
So, from time to time you see final results. Then you check back 10 mins later (you're directed to a diff centre) and the results are different.
The dance goes on, and this month we have even less idea (just like all of the others) when it will finish.
The update has happened/is happening and at the current rate, the last remaining two datacenters will be updated by the end of tomorrow. Then comes the adding in of backlinks and recalculation of a proper PR that isn't from 3 months ago.