That's the equivalent of someone looking at your avatar and thinking it's one fluid motion.
It's not a "game-breaking" phenomenon, it's just an issue that some people find difficult to play through. And not because they're stuck-up elitists, which I'm sure is right on the tip of your tongue, but because there are just some technicial issues that people have problems with and prevent them from getting immersed in the game. And the fact that you didn't notice the slowdown sounds like a personal problem for you. You might want to get that checked out.