Yes, these do drop unique plate, from 44 to 48 AF, gems for the jewelry slot, and unique weapons - daggers, short swords, ******* swords, all yellow at 25 and yellow/blue at 26.
I've submitted the stats and screenshots so I won't list them here.
I'd say that I've had about 2 items/bubble at lvl 25, less than the ghouls in Avalon Marsh, but much better than Keltoi.
The Elementalists drop caster stuff. Don't bother with the other mobs in these Drakoran groups, never saw a Grunt or Leech drop anything.