He makes mention of that in his book. He uses the example of online poker players, which he used to be. He doesn't consider himself great at that either, just better than the hordes of rank idiots that played during the online poker bubble before the feds shut him down. One they were chased away by the various lawsuits, he lost a great deal more of games.
He also says that effort/optimization falls under the Pareto principle, where the last 20% of your optimizations is about 80% of your work, so it's a lot harder to get from being pretty good to world class. But any model that takes into account prior data will get you a hell of a lot of the way there.
He also says that effort/optimization falls under the Pareto principle, where the last 20% of your optimizations is about 80% of your work, so it's a lot harder to get from being pretty good to world class. But any model that takes into account prior data will get you a hell of a lot of the way there.