Another point made in the program is that T-Rex's arms are so small and don't lend themselves to grabbing and holding a meal. Again, the arms of the T-Rex were compared to that of the Velociraptor. The Paleontologist in the program believes that the worse thing that could happen to a T-Rex would be to fall, because he has no real arms to support his body or help get him back up. He believes that a T-Rex could be seriously hurt from a fall. I'm only half-way through the program, but his concept is something to think about.
I'm also reading "Tyrannosaur Canyon" by Douglas Preston ( Preston & Lincoln Child...Relic, Riptide, Cabinet of Curiosities, etc.). The theory that dinosaurs were feathered critters is used in the book. It's the first book of Preston's that I've read and I must say it's pretty good. I've read many of the books he's done with Child. They're two of my favorite writers.
LOL. T-Rex tipping!
This, by no means implies that T-Rex was not a predator. Built for speed or not, because of his size, the T-Rex still had a longer stride than many of his contemporaries and could probably still outrun many. Also, the same predator = speed reasoning would sort of imply that rabbits might be predators because they are built for speed.
Another point made in the program is that T-Rex's arms are so small and don't lend themselves to grabbing and holding a meal.
With jaws the size of a T-Rex's, I think that is a moot point. Dogs, wolves don't really have 'grabbing' capability either, but they are certainly predators. It's all in the bite.
A predator doesn't have to be a great runner. He just needs to be able to run faster than his intended prey. The larger herbivores were not built for speed