You do NOT make TX brisket on a Weber grill. Have any of the writers ever talked to anyone who makes brisket? TX style brisket is known for being cooked low and slow, in a smoker. It's a 12 to 18 hour process, depending on the size of the brisket, the smoker, and the pit master techniques.
Also, I suppose it's possible that some pit master somewhere uses cumin, but that seems very unusual -- I've never heard of anyone doing that. The best brisket in the world -- Franklin, in Austin, TX -- is seasoned with really high quality salt and pepper.
Fifteen minutes of Googling would have provided this information, so I'm sorry - I need to give the writers a big fail for not bothering to make sure they had facts concerning something they obviously aren't knowledgeable about.