Jonner says he was "gifted as a listener"; however, it seems that he's more of a mouthpiece for the team. As Blix never says anything, it is possible that Jonner is referring to the ability to receive telepathic messages, or even listen to people's surface thoughts. More likely, Jonner is a simply a capable spy, and is referring to his profession euphemistically. As there is no explicit mention of psychic powers in Freelancer, the question is open to speculation.