No offense, Flawed, but I think you're missing the point.
It's not that the denoument is unfolded quickly or slowly, but the fact that success or failure at the moment of the climax rests solely on the use or destruction of a single object. In the Lord of the Rings, once the ring is destroyed, the bad guy simultaneously dies. Same with the exhaust port on the Death Star in Star Wars.
In each instance, the tension is raised to such a level that the lives of all the heroes involved hang in the balance. Salvation, though, comes instantaneously, once the plot coupon is dealt with.
Langford finds this sort of plot device to be a cheap and easy way of A) having an excuse to combine certain story elements together, however implausible, B) heightening tension to the point that success seems impossible, without risking writing yourself into a corner and C) dissolving that tension with a snap a finger.