That is a 120hz monitor, which is designed to have the least ghosting possible. This has many reasons. One is to make 3D more tolerable so that you don't see ghosting from the previous frame, which would be from the wrong eye. And part of it is to utilize the 120hz better.
And as I said, it depends. Some TN are worse, some better. Usually the most popular TNs here on OCN are a bit better. But there's plenty of TNs I've seen that are also worse.
EDIT: And on another look at that, that's not a huge difference either.