Fishy enough that the SEA's own Twitter account is gloating about it?
If it's not legit it would have to be because they let their own Twitter account get hacked at the same time Twitter was being hacked... which seems very noncompliant with Occam.
Having said that, what on earth is it about that account that makes you think it has any kind of authority?
To be frank, I just couldn't care less who it was. This action is utterly irrelevant to anything that is happening in the real world.