I also hate it when someone tells me to slow down. But I know the reason they do it is because they want to help, so I don't hold a grudge that much over it. Yes, sometimes telling me to slow down puts more pressure on me to be fluent, but at least they do it with good intentions. I wish I could tell everyone that the secret words for helping me be more fluent is to ask me to stutter as much as I want, once they do that, I feel no pressure at all. Kinda weird.