IMO, the bigger issue is whether or not the Kerry campaign was fed the questions before the debate. Kerry seemed to know what was coming and his responses were too polished and, in some cases, segue'd right into the next question a little too neatly.
Has anyone dug into whether Lehrer clued Kerry in on the questions in advance?
Bush on the other hand was typically asked to defend a position that was described using pejorative terms.
There was definitely a bias in the questions asked by a "star" of the Media Wing of the DNC.