That link doesn't really say anything.
I read PLB's book years ago - he was on Realvision more recently, maybe a couple of years back. I'm agnostic as to his veracity, other than to say a sustained 40% ROR from a sole operator lacking a structural edge (ie not scalping broker flow in the pit) is nothing to sneeze at - and a CPA attestation is more than 99% of gurus and FinTwit personalities will ever produce.