Even all 2011 XPERIA´s have the same Hardware, i dont think, Sony will update all Mobiles to Jelly Bean. I think, first Sony will say, that thy won´t update the Mobiles, also XPERIA arc S. Then I think, the people will be very unhappy. Then, 5 Month after Release, Sony will say, "Okay, because all people are unhappy with our update plans, we will release JB for arc S, Neo V and Ray, (and perhaps arc, but i dont think so

) I think, they will say this in End of July, and we will get JB at the End of October. But I think, It will never run as smooth as GB, not even as ICS. i think it will run like a X10 with 2.3.3 with 100 Apps
Press Thanks if you think the same.
Sorry for my Englisch, I´m Austrian
Thanks for Reading