Doesn't one of the Mage summoned pet items have haste on it?
One common example of an NPC with a haste item in it's loot table on live was "a frenzied ghoul" that drops the haste sash. According to even the main note on the NPC, it says he hits faster when he has the sash. Maybe somewhere in that long line of posts there are actual details on a parse to prove he is hasted by it.
http://eqbeastiary.allakhazam.com/search.shtml?id=3457