So can you? I find that alot of console players say they cant tell a difference between 30 and 60 fps. I rather find that the difference just isnt as great as say 15 fps compared to 30 fps. Keep in mind you need to have a 60 hz monitor or tv to see 60 fps on your screen regardless of what your console or computer are rendering at.
Here is a link where you can see animations rendered at different fps. So..can you see a difference?