I think that's different, because you're not really copying it line for line. I believe that tracing really isn't drawing. It's just going over lines that were already put down on paper by someone else. Techincally, you didn't draw it, someone else did. That, and you can't teach somebody a talent.
Art is tricky that way, since everyone is different and has a different way of seeing things.
I've been drawing ever since I can remember. My drawings weren't the best, but they weren't bad either. Everyone always wanted me to draw things for them, and after a while, I started charging. Anyways, I think my skill is half heriditary, and half from practicing. Either way, if it wasn't for all those years of sitting around and drawing, I don't think I'd be where I am today.