:/ Not really. I have one, and it sometimes makes it a bit easier, but since most of the tracing involves very tight controlled lines defined with bezier curves, it's just easier to use the pen tool, and methodical control of the mouse.
The one time that my tablet really came in hand was in tracing a whole bunch of little wiggly details on the Q-bert marquee that I traced. Other than that, it is somewhat detrimental. It would be great to use for starfield images like those on the defender bezel and galaga bezel.. but those are the best uses for one.