Sometimes I will. Particularly when I have a lot of tasks to accomplish or something very difficult to work on, I find that it can help me to speak about the process and comment on whatever it is I may be doing at the time in order to make sure I'm doing something correctly or not forgetting about something.
I feel stupid for admitting that because I suppose just having internal dialogue could be just as effective in some instances, but for some reason it works really well for me when I say stuff aloud.