One of the manuals (from memory) said that they are mismatched, and may be so, for up to 100 miles. One can imagine that there would be quite a bit of "stretch" in the initial running in process of the the track, and that once the pin and link load surfaces have bedded to each other, that there would be a period of dimensional stability.
(well how else would you describe it?)
From here on, it just goes down hill, so to speak
From the practical side, Does track tension make any difference?