The thread reads unnecessarily uncharitable considering the frankness and his generous willingness to explain his methods. While it is hard for me to know if he averaged >20% over the decades( would be nice to see a buffet like yearly table in a letter) is it really hard to see that he averaged > 20% annualized in the last few years considering the prices he bought bac, gmwsb and fiat or even chk at?
Also it is the reporter saying that it is not allowed by law to disclose performance. Mohnish just calls this years perf irrelevant why is it a red flag?