I'm not a video editor or a film maker, but I can tell you this. 9 years ago, when Quake Deathmatch was all the rage, I was initially averaging about 30 frames per second. I had a "slower" machine at the time. A full rebuild about a year later yielded no less than 60 frames per second. Wow, what a difference. My response time improved, my scores improved... it was like night and day.

So from that alone I can say this:

There is a noticeable difference, improving frame rate beyond 30, at least until 60.

Though I can't say about going above 60... while you are less likely to bottom out to a noticeable frame rate if you are running higher than 60 (120? higher?) you probably wont notice any actual improvement while you are up that high.