From this video;
Reno Crash Live 2011-09-16 - YouTube
If anybody can work out pitch rate for the first 45 degrees and the last 45 degrees of pitch, we can work out g. Might need a stop watch after correlating to the video clock. I got 90 degrees in 2 seconds but that's rounded from the video. Even then, works out to 16-20 g's average. Makes sense that Voodoo pulled 10g with one tab intact that GG would pull 20 g's with the only trimming tab displaced. If we can get tenths of a second, the number will be more accurate.
Torquing across the elevators due to the one tab is still bothersome, and a failure mode could be either elevator twisted loose from the torque tube exciting the 180 degrees out of phase plunging flutter of the horizontal that might be seen in the video. This would over strain the tab actuator rod causing the tab to flutter/fail allowing a higher g pitch up than Voodoo.