In my experience usually not. Your text is moving with only so many pixels per frame in any case due to having to be readable, so what little MB you would see, is not worth the effort and extra render time. There are some examples, though, where text is moving more graphically, e.g. being re-arranged while scrolling or doing other funny things that use it. If I remember correctly, "Madagascar" (the Dreamworks animated movie) had some of that and you can find it often with comedy movies.
Here's presets for TV:
For film, you will easily get stutter if you scroll too fast, just like panning a film camera (24 fps) too fast will make everything jump and flicker. I would use a movie DVD end credits as reference and add a bit of motion blur.
- Jonas Hummelstrand