Many of my sites on network have changed PR. Some dropped some went up. But the main surprise was about one site that from PR0 become PR4
Then you're wrong. PR was the biggest factor in ranking a while ago but now-a-days, it's really matters. Still any doubts, create a new thread, you'll come to know.
This PR update didn't make any changes on my website but I got sitelinks for my few websites so not sad
Though it's 7 days old news but want to say "Congrats" I wish I'll post some good news on my site in the next update of PR such as you.