Welcome to the forums.
30 FPS will give you a bit of noticeable lag, depending on the rate of gameplay.
60 FPS is just about perfect IMO. I know people are saying 120 screens offer a better experience, but 60 is fine for me.
So, if you have a "normal" screen, you won't notice anything over 60, and depending on the game even 30 could be manageable.
Now, if you want to know if the score on your exact system is a bit lower than it should be, I'm afraid I have lost my enthusiasm for such things.
If you don't get the replies you are looking for here, you might want to ask a mod to move your thread to VC&G.