When looking online, David was under "lead producer" but I do remember seeing David as "senior producer" on another site too. I also remember Phil being the face for Madden 09 on the IGN/Gamespot vids. So yeah, it is kinda confusing. In a way it seems that both Ian and Phil replaced David. I also remember hearing that the person that did the sound/audio for the last gen madden games is coming back to do Madden 10.
Overall, it seems that the people that did the last gen maddens are coming together again with Ian being the face of it all.