This site has some interesting ideas about the break-in method, including the hows and whys of an aggressive and quick break-in:
http://www.mototuneusa.com/break_in_secrets.htm It seems to go against all that we have learned from the past, but as the Moto Man states, our engines are precision machined, and there is little other than the transmission gears and the rings/cylinder walls that need the edges and crusties smoothed off.
Dave