We’ve updated our index today with freshly crawled data – it now includes full crawl for 2010. Our crawling system is now recrawling a lot of URLs, so you should be able to see more fresh December 2010 crawl dates on backlinks: URLs with higher ACRank get recrawled more frequently.
We’ve also revised calculation of ACRanks to have better distributions, you can see new thresholds in our updated Glossary entry on ACRank. Don’t forget to use our Bulk Backlinks Checker tool to quickly see actual number of referring domains, IPs, EDU/GOV links pointing to URLs – this gives better precision than ACRanks.
Feel free to tell us if you feel that our index is becoming much fresher!