Yup, that's the impression I got. If they left him in to get made, then he'd say, "just think of the possibilities if I make capo" and on and on.
There are no real spoilers because much of the book is a re-hash, so I'll mention one part.
Pistone claims that after the infamous 3 capos hit of 1981, Sonny Black sent him to Florida to sit down with 2 made guys to put their minds at ease about getting whacked themselves.
The idea of an old school capo sending a mere associate to assure 2 made guys that they wouldn't be hit is implausible. Actually, it's a serious breach of mob protocol, and I don't believe it.
So, it reflects what TB stated about Pistone's relationship with Sonny Black. He often comes across as a kid bragging about his ties to the mob, especially when he brags about how close he was to Sonny Black.