I'm getting a lot of personal messages asking this question.
It's a yes and no answer.

Yes, when Joe Fosco sticks to talking about the Outfit structure and tells some of his stories that don't have a MOTIVE behind it, like hatred, then he's very good.

When he starts saying that John DiFronzo ejaculated sometimes when he was kicking someone in the head or when he gives details about a murder that took place, He's full of shit.

Have you ever heard me go into any detail about those kinds of things? No. Why?
Because they were NEVER discussed.
Willie Messino never told Joe Fosco who killed Sam Giancana or any intricate detail of any other murder. No fucking way.

Willie Messino would kill Joe Fosco in about 30 seconds if he were still alive.

Joe Fosco hates John DiFronzo and calls him a mass murderer.
How the fuck would he know?
The Outfit never threatened to kill him in 2004. Joe Fosco is like a fly on a donkey's ass to John DiFronzo.

There would be no reason for them to even care about Joe Fosco at all. He is nothing to them. If anything, Rudy Fratto would thank Fosco for helping them con his friend out of $400,000 Dollars.

They can't even kill Frank Calabrese Jr. who walks around free giving interviews. Why would they want to kill Joe Fosco?

So, it's really a yes and no answer. It depends what Fosco is talking about and if he has a MOTIVE behind what he is saying.