In the strictest sense, yes. But it seems quite reasonable to think that there is something like an "FPS equivalent" for the human eye. I mean, it's not magic, and physics comes into play at some level. There's a shortest unit of time / amount of change that the eye can resolve. From that you could work out something that is analogous to a frame-rate.

And if it were indeed the case, then it would surely be far in access of 60fps

Not necessarily. Quite a few people believe that the human eye "FPS equivalent" is somewhere between 30-60 FPS. That's by no means universally accepted and since it's just an analogy to begin with the whole thing is admittedly a little big dodgy. But by the same token, it's not immediately obvious that the human "FPS equivalent" would be "far in excess of 60 FPS" either.