As far as I'm aware, the previous versions gave an audible warning when the flight parameters were exceeding limits. The new system attempts to actively take control and sink the nose. If you know the system from previous aircraft, you'd expect the same behavior in the new one. I'm certain they mention this in training, but if English is not your first language, you'd have to pay particular attention to this part or you're screwed.
There was no new training for this is what I've read. Boeing thought the new system was simple and similar enough that no retraining was required for the new model.
