Within a week is pretty impressive considering the scope of their security breach. Inconvenient? Absolutely. But it shows quite a bit of resources being thrown at the problem on their end, human and financial.
Or a sign of a complete lack of security measures in the past. I mean... what do we know so far?
They learned on Mai 1st (a Sunday) that there servers have been compromised two weeks ago. The first question coming to my mind is... how so? What happened in the middle of the night on a Sunday that woke them up?
Secondly, allegedly some old data from 2007 was stolen. Makes me wonder where that information was stored and why it was still around anyway. Judging by the fact that the "real" database is allegedly unaffected, it seems to me that some back-up was stolen.
Yes, I am speculating wildly, but SoE still has to give any real detailed information.