It is, but it's also a case of, "...I may not be able to answer as much as you want me to." Yes, he was a prince of their people, but he also spent most of his childhood in isolation away from his people, Vegeta never got to really see how they lived or interacted.

"But I will try." Vegeta finishes off as he steps off the roof of the train so he could float back down to the platform, treating that as a parting and to leave Trunks to his own space.