Page is a not externally linkable
-- Google SEO News and Discussion
---- Google Updates and SERP Changes - October 2012
viral - 8:09 am on Oct 24, 2012 (gmt 0)Thread source:: http://www.webmasterworld.com/google/4502247.htm
Not sure how accurate it is but mozcast.com seems to be saying plenty of variability at the moment. if you click on metrics and then serp count there was a big spike.
Brought to you by WebmasterWorld: http://www.webmasterworld.com