Why is this a bad thing?

[KrazyHorse]

Dude, did you read the results? They're making like 10% a year more than the market. Any portfolio manager to do that would be considered a ****ing genius.

[Felch]

No, and I'll tell you why. Because I'm a busy man, and busy people skip the greek and go straight to the conclusion.

Is it possible that these results are non-scalable? Portfolio managers are probably dealing with larger sums of money, and the majority of these transactions were relatively small (<$15000). Maybe if portfolio managers would be able to replicate these results if they were dealing with smaller accounts.