I agree, the guy has that right idea, good info. I think there could be a difference though, with a brand new factory motor and a motor you have some local person build. I think that mechanics have their own ideas and build there motors accordingly. If you go to a builder that does all race or performance motors verses one that thinks he's doing you a favor by setting up clearances tighter for longer average driving engine life there could be a problem. The perfomance guy knows that full throttle operation is part of the break in.
It will be interesting to see the future article on bearing clearances.