I have had deer come to the turkey call several times. When I'm scouting or just hiking I take my turkey call. Every hundred yards or so I'll give a few low yelps to help cover my noise. I was very suprised in how many more deer I see since I started doing this.
Like RemingtonMagnum said, deer feel very safe when a turkey is around due to it's SUPER danger spotting abbilities.
An old turkey hunter turned me on to this GREAT TIP years ago.
I figure first they hear your boots coming through the leaves and go into ALERT mode. As long as they don't spot you before you hit the slate they think your a turkey and the ALERT mode is GONE.