So there's this thing about baseball players, the best of the best have been tested to have "better than perfect vision." Like, "perfect" is 20:20, right? Only that's not perfect, that's average. And for every person with below-average vision, there's someone with above average. The best baseball players have 16:20. (fun fact, you can get prescription eyeglasses that give you better vis; mine are 18:20)
You, my friend, are blessed with vision that can perceive very high frame rates, probably much higher than the average person. You're probably great at videogames.
I can only perceive the difference between 60hz and 120hz when they're side-by-side, and even then I find it more of a curiosity than something that assists or abets usability.