My statement is the following: at high TV, in a MM environment the best teams are Chaos and Nurgle, in my opinion.Matt's synopsis is sound if you work form the assumption that maintaining a high TV is the aim. If the aim is to win games then there are 13 races better at that than Chaos and 15 better than Nurgle (by win% from FOL stats). The top 3 are Undead, Lizards and Amazons by win%.
In a tournament format, short league (where a high TV cannot be reached) or in MM at low TV they both suck, because they start with very few skills.
Chaos and Nurgle gain more benefits than Undead, Lizards and Amazons by staying at high TV, we already discussed this previously, in the other forum as well, Amazons and Undead peak their efficiency at lower TV than Chaos and Nurgle.
About Lizardmen, they start with high ST players, and they are strong at high TV, but they don't want to stay there because Chaos and Nurgle players can shredder the Sauri.
High TV it's not a sheer goal in itself, but Chaos and Nurgle benefit more of it, this is my point.