No, what he means is that in the city of Denver, and Denver county you are limited to 12 plants per house no matter how many adults live there.
Epc is extended plant count. Amendment 20 that establishes medical rules only cover 6 plants, but doctors can write a recommendation for more plants based on patient needs. Extended counts however are not protected the same way six are under amendment 20. Technically you can still be arrested for having more than six plants, but you may use the extended plant recommendation to raise an affirmative defense. Of coarse, by the time it gets to court you are in a world of suck anyway. Most officers from my understanding will not mess with you for having more than six if you have a Epc rec, and aren't selling.
Crackdowns are coming, we will just have to see how severe. It's no big secret that extended plant counts and the caregiver system are being abused to supply the black market. It's a shame that the greedy people in this world are screwing things up for the rest of us.