What's up with Google?

On August 24th it was reported that Google was updating backlinks on these two datacenters: 64.233.187.104 and 64.233.187.99. It is normal to see a backlink update on a few datacenters and then within a couple days the update is usually live on all of their datacenters. The weird thing about this update is that we are currently on day 6 and there has been no sign of them updating the majority of their datacenters. This makes me think that a couple things could potentially be occurring...

Google is trying a last minute tweak to their algorithm and they want to test it out on a few datacenters before rolling it out to the rest.
A problem occurred when they updated those two datacenters.
The update "accidentally" happened so they decided to halt it for now.

Google has up-to-date data on their end, but the backlink data they show publicly is old, so there could be nothing here, but it just seems a little weird to me that the update has not been completed by now.

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