Another point worth mentioning is that during the hard pitch-up by the pilots of AF447, the stab trim wound all the way back to +13 degrees. Due to the way the systems are designed, only by manual selection of the F/CTL page on the ECAM would reveal the true position of the trim.
Question from an occasional spamcan (and armchair)flyer: is it possible that with the trim all back (without the crew immediately aware of it), one would need to pitch down and/or roll the trim wheel forward for a
very long time to get the plane unstalled. For such a long time that after half the time actually needed a confused pilot could get the impression that he must already be in the first quarter of an outside loop and therefore ceases his efforts?