Earlier quoted context omitted.
One of those things that some people notice, some people don't. I'm definitely in the camp where I feel differences between 120hz and 60hz, but I don't feel 60hz as choppy, and beyond 120hz I can't notice any difference, but others seemingly can. Maybe it's our biology?
I would bet most people would fail a blind test.
Most people who’ve used both 60 and 120 could tell, definitely if a game is running. Unless you’re asking me to distinguish between like 110 and 120, but that’s like asking someone to distinguish between roughly 30 and 32.
North of 120 it gets trickier to notice no matter what IMO.
I can live with 60 but 85+ is where I’m happy.