Like I said, I really wish I could find the audio of this. TFN had a page with four audio files broken up by the people being interviewed (Kershner, Hamill, Jim Ward, and the lowry guys). I don’t remember now how I found it, this was of course way back in September of '04.
http://theforce.net/latestnews/story/Lucasfilm_DVD_Press_Day_Audio_Files_82683.asp
Thank you, Tobar!
Here is the direct link to the interview I was talking about. Jump to about 4:10 and you will hear John Lowry say in no uncertain terms that they were working at HD resolution and not 2k: