Intelligent speaking

I have been told that people who speak fast are fast-thinkers and quite intelligent. I am a slow speaker, partly because of my heritage and my accent. Would that mean that I am also a slow thinker?

I just read some recent research: slow speakers appear to be more intelligent to the listener, because of a clearer way of delivering their message. The most important thing is not how much you manage to say in a short time. The most important thing is what the listeners manages to understand.

My conclusion is this: if I think fast and speak slow, I am as intelligent as I appear to be. (Not saying that I appear to be intelligent, though.)