I'd just like to confirm that this happens when playing in OTS mode - Geralt's movement speed is highly variable and seems to change after loading screens, dialogues, etc. Sometimes he is very fast, to the point where it is almost comical (and useful for getting around quickly) and sometimes he is quite slow, slower than some NPCs. It seems to be almost entirely random, however, because I have observed him moving at different speeds in the same locations at the same times of day. Might be related to meditation and whatnot, but I don't think it is connected to how much he is carrying or anything like that, and is also not dependent upon the game's framerate.EDIT: Upon further observation it appears that it also occurs in the point-and-click modes of play as well.