+1 more that will sit in silence until after the hand.
Once the hand is over though, I'm usually willing to chat with fish. I''ll pretty much never say what I had (lying or truthful) but I'll say something like "Good fold" or some other vague type of comment to try to make them feel whatever way I feel is most beneficial to me.
Poker is a game of psychology (Well, it's a war really
). You should be trying to gain any edge you can. Many people (including myself) feel that someone is more likely to give away extra info if they're talking. I will often try to get someone talking OTR when it's HU and I'm facing a bet or raise but I am much less likely to talk when the situation is reversed.