Vindication!

From Blue Post

We just hotfixed Sapphiron's Frost Aura so it should do the damage that was seen previous to the 3.0.8 patch regardless of the size of the raid or your server's performance. This should be 1200 every 2 seconds in Normal, and 1600 every 2 seconds in Heroic. You'll notice that the Frost Aura debuff you have no longer has a duration that refreshes. The tooltip also incorrectly lists the damage as occuring every second. The tooltip error will be fixed the next time we make a client patch available.