Drizzt isn't as suspicious as he could be, owing to the fact that his father had openly said he was friends with Jarlaxle, and he takes everything said by his father to heart. Jarlaxle had a similar pragmatism to his father, that much Drizzt knew before, but now he knows it was more than that. He looks over Jarlaxle's face, searching for something.

If he is truly a friend of Zaknafein, then Drizzt won't keep the truth from him for long, but he wants to feel the other drow out first.

"You were friends with my father since your days at the academy?" Drizzt asks once his internal debate is finished, face set resolutely, as he intends to get some answers.