I have to wonder if there are some imperfections in the simulation which cause it to evolve toward a blade that's optimal for the sim, but not as good in real l

I have to wonder if there are some imperfections in the simulation which cause it to evolve toward a blade that's optimal for the sim, but not as good in real life. He talks about 20 minute tests, and then later uses a 12 hour test and gets a significantly different power number. I wonder how differently the evolution might proceed if he just had more power to run the full tests on each generation.