To be honest, it wouldn't surprise me if it was a rogue Anon, but AnonOp's? No. They wouldn't bother lying, and to be honest, I don't think they would steal the information, they may break in and make in known that they had, but not bother stealing the CC information of the customers...even if its as simple as they knew that that the police would get involved and they would get caught very quickly.
What I would like to propose to Anonymous is this. If it wasn't you and you stand for the things you say you do and you are as strong and as clever as you say you are, then why don't you go find who did this? Present them to Sony, and then laugh in Sony's, The FBI's and Homeland security's faces, because you did their job for them. How about stop pretending your working for the good of the people and actually do some good for a change, rather than sitting there quoting Legion from Shadow Man (I know Legion is from the Gospel of Mark, but I am sure that's not where they heard it from).