Yep, the update is taking place. Look here http://www.seochat.com/seo-tools/future-pagerank to see your PR on different datacenters. Here http://66.102.7.99/ http://66.102.7.104 I’ve noticed updated backlinks listings.
This time (as opposed to last couple of updates, when month old sites were getting PR5) only old solid domains improved their page rank. I finally got PR5 for my main site. On the other hand, new (one, two months old) domains or recently optimizes sites did not improve their PR.