Another problem with scrolling text is that the reader can't read it at their own pace. They're forced to read it at whatever speed you deliver it. They might have preferred to read those two sentences quickly and then move on, but because it's scrolling they have to sit there and wait for the text to slowly appear.

This brings up an important point: Always keep your visitors' interests in mind. Make sure you try to please them, not yourself. Scrolling text does nothing to serve the visitor. If it's on a site it's because the site owner thought, "Let me show how cool I am." Do you see the difference? Don't design the site for yourself, design it for the people who will actually use it.