Besides www.google.com, are results from other Google search engines included in the 'Report Top Referring Searches from Google' report?
November 2011 and newer
All Google search engines (i.e. www.google.co.jp, www.google.co.in, www.google.co.uk ) are included in the Top Referring Searches from Google report (ID 216). This is how the report works.
This report references kf_top_item_stats and kf_searches table which is processed data from the clickstreams table. All customer portal access coming from Google search engines will be included in the clickstreams table and this report (for example: www.google.co.jp, www.google.co.in and www.google.co.uk et al).
Similarly, in the 'Top Referring Search from Yahoo' report (ID 222), it will include all the search results coming from Yahoo search engines (i.e. www.yahoo.com and www.yahoo.co.jp).
For more information, see the following answers: