It seems rather odd that the person who was hacked hasn't come forth and identified himself.
I can assure you, if it were me, you wouldn't hear me identifying myself publicly.
What is there to gain? Sympathy for Mt. Gox?
If MtGox hadn't decided to do a roll-back, and it was your account that was hacked, would you have gone public?
Remember, there was a period of time between the alleged hack and the decision to roll back. Would you have been satisfied merely complaining to MtGox privately until the decision to roll back was made?