Every month, WebmasterWorld members touch upon new trends that they notice in the Google SERPs. We haven't covered this on Search Engine Roundtable yet before, but if trend analysis is something of interest to you, we may begin to do so (let us know via the comments).
WebmasterWorld members are reporting some October changes, particularly relating to the SERPs on the following Google datacenter IPs:
The response regarding these new SERPs are mixed. Some people are seeing better content, less supplemental results and scraped sites, and more "old fashion content." Others, however, feel that their sites are the ones that are being dropped out of the index in lieu of these new scraper sites. It still appears to be difficult to determine who is the authority site when it comes to Google's preference of the original content.
Forum discussion continues at WebmasterWorld.