http://bugs.winehq.org/show_bug.cgi?id=19377
--- Comment #1 from Rosanne DiMesio dimesio@earthlink.net 2009-07-20 11:23:48 --- Looking at the entry for Powerpoint 2007, it appears I was wrong about the overall rating being an average of recent tests.
At this moment, the overall rating for Powerpoint is silver, based on a test submitted on Feb. 27 for 1.1.15, despite the fact that I (the maintainer) submitted a bronze rating for 1.1.22 on May 28.
So whatever the formula is, it is not only misleading, but appears to be intentionally so.