I have to respectfully disagree, because, to my mind anyway, wouldn’t that communication style be apparent right from the get-go, rather than changing once the person was sure that they had love-bombed their target into a connection that would be harder to untangle because of finer-feelings, emotional and possibly economic dependence and sunk costs such as housing, marriage, and children? Only then do narcissists begin the devaluation process, once every-day life has settled past the honeymoon stage and they are no longer receiving the narcissistic supply they need to support their empty egos in the form of unconditional regard that so often accompanies that first stage.