There is no lead platform for GTA 5, Rockstar developing the game at the same time for both PS3 and 360

[Nsanity]

007BondAgent said:
I don't believe it, they have only been showing the ps3 version of the game

Showing the PS3 version was probally to reassure PS3 owners that it wouldnt end up like the last Sub-HD, muddy looking GTA 4.