Really? People use wire brushes to scuff the tires? I think that's totally pointless. I don't think they need "scuffing" at all. From my track day experience, the best way to break in a new tire is to get heat into it and the best way to do that is to accelerate and brake "briskly", but not stupidly. There was an article in Roadracing World a couple years back that demonstrated that weaving only added a nominal amount of heat. When I go out with a brand new set of tires (my tires only last for 2 or 3 track days, so they're almost always new), the first lap (2 or 3 miles, depending on the track) is spent getting the tires warmed up. After that I'm free to play; full throttle coming out of the corners, stoppies into corners, knee dragging, etc.
With street riding, whether the tires are new or old, just take it easy for a couple miles until some heat gets into them. That means that on hot days it'll happen sooner, and on freezing days, it may take 2 or 3 times longer. Okay, so if you're worried about new tires having "oils" on them, take it easy for a bit longer, but I don't think even that is necessary.
And that's my 2 cents that's worked for me.