jonathanleger - 8:12 pm on Sep 16, 2010 (gmt 0)
While that explanation certainly makes sense, it's not playing out for all of the keywords (unless I'm doing something wrong).
The new interface for some keywords I follow is showing more searches than the old interface (both global monthly and local monthly searches). For the particular keyword I checked, the new interface shows 40,500 global searches, whereas the old interface shows 27,100 global searches.
If the old interface always includes the search partners, shouldn't it always show higher volumes?