Too bad Vincent can't see Irahl's eyebrows raise. Yes, apparently Vincent's reluctance in regards to the Capitol has been obvious enough to cause an expression of surprise to actually register on the sniper's face now.

"You are."

It isn't phrased as a question, exactly. More like he's skeptically looking for confirmation that he's understanding this correctly--or hesitant to trust this fact as true until he is doubly-assured, so that he doesn't get his hopes up for nothing.