When the top few hundred only average 15 nergs, and the top thousand only average 1 nerg, for the top 5 to all have exceeded 100 nergs (and be the only people that have done so) does show prolific nerging.
That the nergs are weighted, and score against the person receiving rep is what that chart shows... the sum of score subtracted as a result of the weighted nerging.
When the top few hundred only average 15 nergs, and the top thousand only average 1 nerg, for the top 5 to all have exceeded 100 nergs (and be the only people that have done so) does show prolific nerging.
That the nergs are weighted, and score against the person receiving rep is what that chart shows... the sum of score subtracted as a result of the weighted nerging.