Disc Priest Atonement nerf might be reduced for 5.3

One of the 5.3 nerfs that had many disc priests crying was the nerf of Atonement by 20%.  Currently on the PTR, the notes state:

Atonement now heals for 80% of the damage dealt, down from 100%.

However, a tweet from Ghostcrawler has given discs some hope that the nerf might only be 10% instead of the 20% currently seen on the PTR.

Great potential news for discs, although I am sure some non-disc healers that are trying to keep up with overpowered priests right now will be a bit disappointed.

UPDATE: Atonement nerf was reduced to 10% from 20%.