^Well, I mean it in the sense that, as Julian himself notes to Sarina, he's since learned to put himself in the mind of such an agent.
And I'd say "Extreme Measures" was an instance of Julian's embracing his dark side, to take Sloan down. Perhaps the student surpasses the teacher, in that case--to put it mildly?
(Of course, I will
say Sarina's reaction to his invoking Sloan's name is a clue to a little something....)