BW, Dar and Downunder are rather respected here. What they are suggesting/recommending as the "proper" break-in procedure IS the generally accepted method for the majority of common tapered-bore engines. It has been tried and proven by many people and even more engines.
I personally have used it or something similar with great results.

It is, of course, your right to disagree. The level and manner of your disagreement is being monitored by moderators and thousands of other readers.

Good luck to all