Yes, in my dreams people speak, though when I try to remember the dream afterwards, it is mute. Also, in most of my dreams I have severely impaired sight and movement, I often feel drunk, when I am in dream. On the other hand, I seem to have extremely enhanced sense of smell; I am even able to remember the dreams by how they smell. I think it is caused by a phenomenon of a dominant sense. I read it in some psychology article (and it sounded pretty reasonable and it had some references), that people usually have one or two dominant senses - these senses are much stronger than the others and people tend to remember more information gathered by them.
Personally, I seem to have dominant sense of smell; I can recognize any place I ever went, because each of them has its own distinctive smell and I almost always smell something others do not. It also poses a problem, because unpleasant smells are more unpleasant for me than for the others and curiously, it is sometimes a problem when relating to girls. Especially when they do not wear perfume, I usually pickup the smell of their pheromones and that has some socially negative effects on me (I think I do not need to explain). Even with my girlfriend it caused some awkward moments, since she freaked out because I really like the way she smells so I try to catch her odour whenever I am with her. Also, oversensitivity comes into the picture here, I cannot cuddle with her for a extended period of time, because I usually get irritated by her smell after the while.
My weakest sense seems to be hearing, I am especially bad in remembering people's voices; I cannot recall even how my own voice sounds like. Also, my sight memory also appears to be pretty bad, my picturelike memories are always distorted, though I can visually remember the big picture (the overall constellation of things) pretty well.
If you try to fit it in character of my dreams, I think it fits it pretty well.....
P.S. The intensity with which I can remember information gathered by the senses has nothing to do with the sensitivity of my senses. I must say that I am have a bit oversensitive all of my senses; I strongly dislike bright light, loud noises (or some specific noises regardless of their volume), strong smells for prolonged periods of time and any form of touching over which I have no control)
Also, I forgot to say, that regardless of their dominance my senses all seem pretty sharp, especially my sight (I can see in the dark very well)