I figured that rtd had written most of the dialogue etc, but the only reason I asked was because rtd said that for elevens scenes in tennants finale moffat would write the lines cos smith was moffats doctor, just wondered if that had carried over.
I think Moffat writing the Eleventh Doctor's lines in The End of Time was more just a passing the torch gesture on RTD's part than anything else. I don't think Moffat was required, or that he demanded it. I think RTD just thought it would be a nice way thing to do.