rudderrat and takata, when rudderrat said or quoted "The elevator orders are progressively transferred to the THS through a low-speed integrator to decrease the drag." was this necessarily correct? Is that from documentation or a presumption?
If I think about the apparent intent of the THS it aims to keep the elevator's mean position at neutral. So it's really integrating the elevator's position not the stick input commands. It will continue to drive the THS downwards as long as the PF does not push the stick hard enough for the elevator to go nose down, at which time THS would move. One comment I received suggests it would move nose down faster than it had moved to full nose up.