Which still leaves a non-sequiter in saying the sophisticated methods led to the high returns. It is more likely to be some form of 'cheating' where they are actually making the money off something that isn't normal trading. Or even corruption in the worst case.

Beating the market by very large margins is a suspicious activity. If raw mathematical insight is enough to get a 66% return then there are a lot of mathematicians out thereto figure out what is happening. If that is the secret sauce it would be extraordinary in a history littered with best performers who were just flat out frauds.