Published November 1, 2012
Google Analytics data prior to May 30, 2012 will include statistics from both the authoring and live environments and therefore will not accurately reflect public use of your published website.
Google Analytics data collected prior to May 30, 2012 will include analytics information from the authoring environment, which could skew the data collected and a site manager's interpretation of that data.
Disregard information collected in Google Analytics before this date. If you are searching for data from a specific range of dates, make sure your start date is May 30, 2012 or later.