"If you can believe the 'welcomes' on the Internet." It was a question without the question mark at the end; Dick wanted confirmation from someone he trusted, and there was no one he trusted as much as Bruce. He was tough, but he'd never do anything to knowingly get one of his people hurt.
"It's an exchange. Someone from out in the multiverse for someone here."
And if Bruce hadn't said 'six months,' Dick might have laughed. His Batman didn't tease like that, though. In fact, his Batman didn't tease at all.
"If it's been six months, we're not from the same place. I last saw you four days ago."