I have a PS3 and it is my preferred system, but I am not one of those; 'AHAHAHAH SCREW YOU!' guys. I agree with what a few people already said. 360 gets theirs PS3 gets theirs.
Although I mainly play on my PS3, I will go out and say I am 90% sure it is probably some Guild mission and that's it. I wouldn't get all hyped thinking it is a game changer.