This has been brought up many times from the distant past and pops up time to time and logical thinking engine builders know that there are two basic ways to break-in a new engine with variations for different applications.
So, pick your own poison. But I would think that Triumph knows a little more about their motors than this goofball does and has a good reason for why they specify how they want their motors broken-in. I wouldn't think that Triumph wants warranty claims on their engines and considering that they know the materials, clearances and pressures involved this is why they have chosen their method of break-in.
But in the end it's your investment.
Don
