From:
While this metamagic feat is active, spells cast twice as fast and cannot be interrupted by enemy attacks, but they consume 10 additional spell points.
To:
While this metamagic feat is active, you cast spells twice as fast and you do not roll concentration checks when you take damage, but spells consume 10 additional spell points.
Enemy attacks can obviously interrupt Quickened spells in DDO. Trip attacks, stun attacks, spell CC attacks, all stop/disrupt/interrupt spellcasting. The description is wrong and misleading.