Qeynos Gnoll Fangs XP Lowered?

[hammburglerr]

Searching through all the posts about the gnoll fang quest (and 300 gnoll fang guide) in Qeynos, I wasn't able to find info supporting my situation. Seems to me like the xp was nerfed (made normal really) at some point. At level 12 and one yellow, I turned in 280 fangs and it only took me to level 16.5. I recorded my turn ins for the levels which I completely used fangs for xp:

Level 13.0 to 14.0 -> 58 fangs (almost 3 stacks)
Level 14.0 to 15.0 -> about 66 fangs (lost track on this one)
Level 15.0 to 16.0 -> 78 fangs (almost 4 stacks)
That is about 200 fangs for 3 levels

This was done using an Ogre Shaman (15% xp penalty) on April 2, 2015.