This has been already discussed to death - and the outcome is the same, as announced worldwide to all the game journalists in the world from the head of Square Enix and the head of Microsoft Entertainment division - FF13 is coming out simultaneously in NA and EU day and date.
All this talk about porting to 360 after is obvious as they actually have to finish the core game code first, and then they will port to both consoles from their Crystal Tools PC engine, first with the PS3 and then shortly after 360. All the delay talk is seriously over-exaggerated.
Its laughable that BioShock is compared to since the PS3 version was not even planned until after the 360 version, so obviously it was a late release. The 360 version of FF13 is already planned when the the game code isnt even finished yet (not even past alpha stage).
Why not you go and watch the E3 2008 conference again where the head of Square Enix/Microsoft announced it.
