Squares explanation for this matter is ancient and is very very different. Basicaly they said MS wanted a separate comunity for Xbox players, they wouldnt acept a joint PC/PS?Xbox comunity and Square didnt want that so they passed on launching theyre MMO on MS consoles. Now passing on launching on MS might mean they made a deal with Sony, but Squenix wanted to release on MS and it was MS's own fault they didnt (according to Squenix themselves, wich may or may not be true).