In some cases it was obvious, in some I had to guess because it was really hard to tell. And what I definitely can't tell is wether or not a game is 30 or 60 fps if there's no comparison. It's hard enough with a comparison for me, even though I got 10/11 right.
Edit: The one I didn't catch was Arma II, even though looking at it now, the rotor blades seem to move faster.
Edit: The one I didn't catch was Arma II, even though looking at it now, the rotor blades seem to move faster.