The article you posted was for Delaney BBQ. This guy had input from Wayne Mueller and Aaron Franklin, actually I'm assuming Daniel had input due to his relationship with those guys, on how to cook a brisket. You also have to take into consideration how many briskets that guy has cooked in the past year. He's literally cooked ton's of brisket at this point as has Aaron Franklin, John Lewis, John Mueller, Justin Fourton and Wayne Mueller.
Figuring out brisket takes time and the Franklin videos will help as will paying attention to Pitmaster T's stuff. IMHO, you will never consistently cook brisket until you cook a ton of briskets but as many BBQ places have proven, there is more to it than how many you have cooked. You will make a good one, but transcendent on a consistent basis is incredibly hard due to the amount of variables and understanding what those variables are and how they influence your product.
Little Miss BBQ