Name one MMO that hasn't been DDoSed, and they likely weren't even worth existing.
DDoS protection varies in strength, as does the magnitude of the attacks themselves. This was obviously a high-level attack that a game with small protection would've struggled to keep the servers operational period. Consider how the attacker has been proceeding and there really isn't any shame at all, except for the DDoSer who clearly is full of shame. Some people are saying SE is lying to us, but can they prove it isn't a DDoS attack? Until they can SE is being honest with us and not hiding anything, which is credible.