Did Riot Ninja nerf WOA?

Its been 10% for (as far as I know) the entire time since its rework (it used to of course give the 20% spell vamp and 30 AP aura; along with 50 to the item user itself)

It now gives 80 AP, 20% spell vamp, and 10% CDR

Edit: it also gave 10 mana regen at one point, but that was changed since the stat was essentially wasted on most people who wanted WotA.

... I think it also used to give 20%. To the wiki! Edit: Wiki says its always been 10... eh.