I don't understand where this Berkshire reverence comes from. Buffet didn't become rich through stocks. His accomplishment is to stay rich by investing, primarily in insurance contracts, and it does look like that is a good way to summarize Berkshire: it's a backend investment fund for his insurance business. It makes his large insurance contracts a lot more competitive. And about that part, he's very tight lipped.
He invests well, but he's hardly the only one, and Berkshire would not work without the backend insurance business generating the amounts of funds he has to invest in the stock market. So all of his advice is mostly pointless, unless you have 100 billion lying around.
I'm saying: if you want to beat Berkshire financial performance, they key to that ... is not investment. Which is the great con Buffett pulls. He shows large amounts of money and a very prudent investment strategy, and with that attracts funds to run his insurance business. NOT the other way around. This is the central component of a huge insurance business: you need a LOT of money, available as capital, to run it. To be fair, I've never heard of him lying about this either, but he's not exactly forthcoming with this information.
He also does remarkably little investing with the time he has. Clearly he's spending the vast majority of his time on his insurance business, not his investment business.