I'd prefer that over the person losing interest. Someone said it to me and it wasn't belittling. We need to realise that people really don't give a shit about our stammer. The only ones that care are us, and that's half the problem. I could see someone losing interest in my when I stalled for 3-4 seconds on a word today. Styled it out, carried on and I guarantee he remembers nothing of the incident. Why would it matter to him?