Dub Jett, master engine builder at Jett Engineering... a man with his share of RC experience and engineering degrees says:

http://www.jettengineering.com/tech/breakin.html

Quote:
"There are more ways than one, but it is important to remember one thing: With an ABC or AAC engine you don’t really have to worry about breaking in the piston and liner as that will take care of itself. The rod and crankshaft journal pin fit is the object of the break in...."

Does the advice never end?

I know I know... he's talking about ABC, this debate seems to be about ringed engines (except for captinjohn... who was talking about ABC)

So who is DEAD wrong and who is DEAD right? I think nobody.

Remember Machiavelli's words:
There is nothing more difficult to take in hand, more perilous to conduct, or more uncertain in its success, than to take the lead in the introduction of a new order of things. -- Niccolò Machiavelli, "The Prince".

There should always be room to question conventional thinking.