You guys think that race teams run them gently for a few thousand miles to break them in before taking them to the track? It doesn't take that much to seat the rings.
I used to build a lot of engines for local racers when I worked at the motorcycle shop. I am talking 450's and 250's with 10-12k in parts and head work. They got a few heat cycles, a torque check, a quick blast out back, and were promptly smashed on
Engines with steel liners where given a little more intensive break-in, but not much.