Yeah I think when they say non-tech people they mean a subset of people who know a bit about refresh rates (example being avid PC gamers for instance), but I'd still say the vast majority of people cannot tell 60 to 120. That or its not something they think about.

Certainly if they had both side by side they may be able to notice a difference, but in everyday use it makes no real difference to the vast majority of people. Anecdotally even though I do use Android myself, everyone around me still think iPhones look the smoothest (albeit most of them have never even touched a quality phone running android)