I'm assuming that's the case because it would be an awfully random thing for them to put in there otherwise, but as a first-time watcher that's not exactly the kind of thing I was keeping track of. It just seems strange and unlikely that they never would have met over the course of the series. The article for the episode didn't mention it (nor did Lucille 2's article) so I thought this would be the best place to ask about it. Knowing how obsessive some AD fans get, I just know there's gotta be someone who's gone back and checked if that's actually true.