Google said they have now pushed this update out "globally to all English-language Google users." So it should be live on Google.com, Google UK, Google Australia and so on. But it wouldn't be live on Google Israel and other non-English language properties.What is interesting is that there have been zero signs of anyone really coming out of this update. So if you were impacted by the Farmer/Panda update back one and a half months ago, very few have claimed to have regained all of their traffic from Google since. I am surprised to have not seen mass claims of improvements from sites and webmasters impacted by this update. I am even more shocked since there was a global rollout yesterday.
Google said the algorithm works even "deeper into the “long tail” of low-quality websites to return higher-quality results where the algorithm might not have been able to make an assessment before." So if anything, it appears to impact even more sites and Google confirmed that, saying an additional "2% of U.S. queries" were impacted by this update. Impacted how? I do not think sites have claimed to be released from the algorithm update, even after updating their sites - but I do see more sites claiming they were hurt by this update.