henra
Taking these aspects altogether, even if I have no specific data for the given case I would strongly tend to believe that ND elevator would have lead to Nose Down attitude change even at these AoA.
Thanks for your comment.
Looking at Fig. 6 (see below) of the NASA report "Dynamic Modelling and Simulation of Large Transport Aeroplanes in Upset Conditions", I see that for the generic twin jet transport model used in that study there was no reversal of pitching moment, Cm, for any elevator angle (between +20 and -30) or any AoA (between -5° and +85°).
Although those results were with "CG=mid", these results are not dependent on the position of the CG.
The efect of a different THS setting might be another matter.
Note: This report was originally pointed to by BJ-ENG on 8th May 2011 in post 943, then again by Beispiel on 9th May, 2011 in post 990, and by Hazel Nuts on 18 June 2011 in post 143.