QUOTE(Mr Invader @ Aug 3 2007, 12:29 PM)

Last you heard? You have a link for this information? I doubt you do.
heres a couple:
Games RadarQUOTE
Yet more rumors circling certain E3 parties suggested that Rockstar is having trouble squeezing the giant game onto one Xbox 360 disk.
UK RebellionQUOTE
Whilst the PS3 Blu-ray disc will easily accommodate the game, there have been problems fitting the game on to a single 360 DVD disc. Microsoft will not allow the game to be released on 2 disc as they are concerned the 360 will be compared unfavourably to the PS3. The situation has led to tension between Dan Houser and the Microsoft Empire as there is currently no way the game can fit on a single dvd.
I'm not saying any of this is true(the guys name is Sam Houser), or verified but the rumors are out there and you shouldn't criticize someone when a simple google search would have gotten you the same info.
Bonus:
opposing view by
N'Gai Croalwho happens to be a much more respected source than M. Pachter.