Yeah, that was how I always saw it. I never thought it was any indication of mental powers.
I don't even think Harrison will have mental powers. Just eloquence & high intelligence.
Though Paramount's official synopsis has the villian described as a "one person weapon of mass destruction." And Simon Pegg in an interview stated the character was a mix of "enemy" and "ally" and that it was an "enemy within" sort of theme as humans have elements of both light and darkness. That looks to equate more to a Gary Mitchell than a Kahn.
Also of note, there is a Gary 7 in the credits on the IMDB