Not in a way to slow things down but I do share with checkout people. I believe every person is important and I want to act like it. This means not acting like all the person across the counter from me is to me is merely a function. They may look at me with wonder and I often feel like I am waking them up out of some work induced trance. I think some of them are grateful. You would be surprised at what can be shared with a checkout person!
I am by nature a chatty person, however, most checkout persons are only interested in getting you out the door. Seldom do they wish to chat, to busy processing your groceries. I’m talking about the large franchise stores. If I happen to go to a smaller, locally owned store the whole scenario changes, now, chatting is a must ... and fun.