I wore in my 01 as you described with the addition of engine braking. I had the break-in oil changed out at 600 miles and replaced with Mobil 1 per the manufacturer recomendation and so far, after 25 thousand miles, the engine runs like a top.
I believe engine braking during initial break-in is useful in that it creates higher than normal vacuum in the engine and would tend to draw oil into the combustion chamber past valve seals and rings, sort of a reverse flush if you will. Does it really work? I have no hard evidence that it does or does not, only the fact that my engine uses virtually no oil between 5K mile changes and, as I said, runs like a top.
Your results may vary.
