Space Wolves Warlord Traits

Firstly, sorry if this is in the wrong place!
So the Space Wolves codex has been amended by GW with a PDF they released on the Warhammer Community site. Does anyone know what the actual changes were? It seems a bit suspect that Space Wolves should get such a quick amendment to their rules to make them more in character, while Drukhari got an interesting rule (Raiding Party) that was immediately made redundant by changes to the CP gained by detachments.

From what I understand of the page that explains this, basically it goes like this:
- They sent the initial 'finished' codex to print.
- Following playtesting, they came up with a new idea for SW Warlord Traits which worked better with their fluff.
- They quickly implemented the changes into every version of the SW codex... apart from the English ones.

So, basically, the PDF page is just correcting a 'misprint' in the English version of the SW codex. Nothing major, as far as I can see.