It’s not as if Markopolos is GE’s only critic. S&P downgraded GE’s credit to BBB+ last year. That’s one step from “junk” status. Shocking when you consider what a blue-chip GE used to be.
I’m really far outside any subject area expertise, but an awful lot of the claims in the report seem to be specific and (at least in principle) verifiable. If it’s baloney, it’s the very best baloney.