The all-important caveat here is that the computers were responding to a consistent demand approximating a 15 degree nose-up attitude from the PF. In the case of AF447 the question of whether the system would have continued to try to maintain that flightpath if he'd let go prior to apogee is moot, as he continued to order nose-up well past the apogee of the zoom climb and well into the stall regime.
As franzl points out, in Alternate 2 the FCPCs become little more than dumb relays to the flight surfaces. His hypothesis regarding the computer attempting to maintain the commanded flightpath is a valid one, but at this point we have no proof.
At the end of the day no matter what aircraft you fly, if you continue to pull up past the approach to stall, you are going to stall the aircraft and the only way to recover is to force the nose down. The crew apparently never grasped ther situation, nor did they ever attempt to effect a recovery.