Who would you rather Trust with giving you Information?
One of the People who work with one of the consoles, or One of the people who are making the game?
We haven't heard anything about Content for GTA IV from R*, only from Peter Moore (I think its his name....)
And in his eyes, GTA IV = more 360s sold = More Money, so naturally he will announce it before Sony does, and make it sound like teh PS3 will miss out on any type on Content.