At the risk of waking the Oozlum bird who has managed the odd 5 minutes sleep here:
As far as we know:
447 was kept in a nose-high attitude by
a) a nose up demand on the sidestick
b) TOGA
c) Full nose-up THS delivered by the software and sidestick demand.
Whenever either a or b was relaxed, the nose appeared to drop. I think it is safe to assume that had the stick been held forwards and the power reduced it would have recovered (given sufficient altitude). This appears to have been a 'foreign' concept to AB pilots at the time.