I think that's what he meant... a general statement to humans.
Now that you mention "MIND WAR", one thing always did bother me. As powerful as Ironheart was, he didn't see in Talia's mind the sleeper program?
JMS was always superb at giving little clues throughout the show about everything. But that seemed like a slight oversight.
Obviously, Bester and the Psi Corps likely examined and gained a lot of knowledge from Talia... perhaps enough to do secret experiments down the road.
I just thought it was a missed opportunity, particularly when you think of the VCR dude in "DEATHWALKER".