I always understood that sidestick in the middle in Normal Law meant zero rate of roll commanded. So in theory once you have levelled the wings and centred the sidestick the wings will remain level. When you start getting close to the ground (50 FT RA) you go into direct law, which means you now have to work at keeping the wings level in the conventional way. Maybe this changeover in Law is where you might get caught out should a wing drop. Up to that point you have been used to not having to make a correction (in roll) to keep the wings level but after you have to correct.