Nope. Modern cards do not HAVE 2D acceleration modules. Recent Radeons simply use OpenGL to do 2D drawing (GLAMOUR layer). And XRender is focused on trapezoids instead of triangles, which makes it non-trivial to implement. So it works quite poorly.
Besides, XRender is not that great even in the best of times. Its support for gradients is not that great, line drawing is mediocre, no support for text rendering, etc.