
The reason there is so much fuss over this rumour is simple; an ESRB requirement for full disclosure of pertinent content may have been violated by Take-Two if the game does in fact have hidden X-rated content. "The integrity of the ESRB rating system is founded on the trust of consumers who increasingly depend on it to provide complete and accurate information about what's in a game. If after a thorough and objective investigation of all the relevant facts surrounding this modification, we determine a violation of our rules has occurred, we will take appropriate action," ESRB president Patricia Vance said.
Source:
Gamespot