I have heard that on PC there are only two speeds of travel, walk and run. On an Xbox, you can vary your rate of speed quite a bit by varying the pressure on the anolog stick. This helps with sneaking because you can move veeerrryyyy slowly. The same thing works with lock picking, so with a light touch, you can get two or three wrong guesses out of a pick on a master lock with low lockpicking skill.
Anyone know if it works the same way if you connect an Xbox controller to your PC?