No, I don't. To be specific, the "problem" that ATI has with 2D acceleration is that they didn't implement it properly. Performance is supposedly reduced, but it still exists. You will only encounter it at high resolutions. Dragging things around will take a long time to update, type takes long to display, and other things. However, it still works. With a fix, I'm sure everything will work fine.
When I work with 5000x3000 files, and I drag something that takes up about 20% of the canvas's space, it takes a long time to display the new location of the object. That is the symptom of little 2D performance.