I couldn't make a whole lot of sense of this article, since they seem to pretend that Dr. Sam Vaknin hasn't already addressed what they say are recent revelations. He wrote a book, Malignant Self Love, which is written in a FAQ (Frequently Asked Questions) format. Vaknin logically distinguishes narcissism from pathological narcissism (NPD). Not all narcissists have Narcissistic Personality Disorder.
I have to read the article several more times, but it's almost written as if by a high school paper, and doesn't have the cliniical approach I'd expect on the subject. It could just be semantics. Maybe it's a bad translation from French. It goes all over the place like a drunk driver. I always thought it was common knowledge that most, if not all, narcissism was actually a projection of various degrees of self-hatred. When broken down into parts, narcissists are after praise. People already comfortable with themselves aren't so hungry to be worshipped. Still, an interesting topic.