It'd make things a lot easier if he knew there was someone else from his century here, sure, but interrogating Captain America isn't at the top of his to-do list. Besides, respecting someone's privacy is a very Cap thing to do.

"So you're— 1943, you haven't even seen the end of the war, huh?"

Clint isn't looking at Steve when he says it — he's scratching at the back of his head with one hand, bow still held idle in the other, and the overall impression is more that he's thinking out loud.