The 5% Nerf/Buff went live today for ICC. Basically you receive 5% more HP, Healing Done, and Damage done. This will be a great boost for those guilds that are 'almost there', and will hopefully let everyone see more content.
For those that want to beat the content without the nerf (This is for Bob Turkey)....
IT'S COMPLETELY OPTIONAL.
That's right, you can talk to your respective faction mate, and you can turn off the buff. It also isn't in place for hard modes.
So to those crying about it being nerfed too soon, turn it off and quit your crying.
To those that PUG ICC - your life just got a little bit easier.