@ ahausheer + mrtodd:
Good points.
A few related items:
--Some engines seem to perform better than others. At least, that's what my dyno operator guy says. Is it because of how the engine was broken in? Hard to say.
--Some break-in discussions include talk of heat cycling. Again, given an engine with any miles already on it, this may be irrelevant. I frankly cannot recall if we have discussed this in the thread already.