Just filling in empty threads...
Their are a couple methods you can do to 'break in' a new tire. I keep hearing this 100 mile rule, but personally I see no need for 100 miles. Breaking in a tire involves gets rid of the shiny surface and to get used to the feel of a new tire. What I do is ride about 20 miles give or take, taking it easy with little lean to the curves and gradually build up the lean as the miles pass. By the time I'm done the 'chicken strips' on the edges will be about half an inch in back and the tires are then ready for whatever type of riding I want to do. Another useful tip is to go to an empty parking lot and do some basic maneuvers like figure 8's at various low to semi low speeds and a few panic stops. Also, rubbing your new tire's with a 'Brilo' pad and warm water just to get the shine off helps a lot. Doing this, allows no need to break in a tire expect only to get used to the new feel, IMO.