Actually this is not true, if you are standing within what the game defines as "melee" range for threat (note, different than melee attack range), taunt generates 110% of the the threat of whoever is the current target of the npc you just taunted, or 130% if you are farther away. You can test this easily by going and finding a random elite in the wild and having a friend or companion attack it for x amount of time, then taunting it and having them stop attacking. As long as they do not start generating threat again, the npc will continue to attack you. Other than that, good write up from what I read.
110% or 130% of 0 is 0. Kitru was talking about why opening combat with taunt does very little for threat generation.