600k+ xp per hour while farming

[thinus]

The mobs you kill for that quest do not grant xp or loot, just like the mobs in sholizhar basin on the ice flow.

I was looting last night. If you don't tag them and use the abomination to blow them up then, yes, you don't get xp or loot. I rounded up loads with the pally and AoEd like mad and they would start respawning before I could finish looting.

EDIT: Seems like some of them drop loot and some don't going by WoWHead comments.