I have to agree IA/Smuggler seems to drop more often. Last week we brought in a fresh 50 into hard modes to fill for our usual agent, and in one run, he was done with gear, all armor pieces, 2 main hands and offhand, from HM KP and HM EV.
Back in December when my guild first started running, we didn't have any agents in our group and after about two weeks, most of the group's agent type companions were decked out in gear, far more geared than any actual players in the group.
While there's a good chance that its just the RNG, but sometimes when a pattern consistently repeats itself, you start to wonder...