I don't trust much of what Roemer says, he's was just too self-promoting and sketchy about just how much he knew about the top of Outfit (ie. Ferriola, late-night meetings with Joe Batters etc.). For all that we know it could have known that these guys were back-room bookies giving him Outfit gossip.
IRRC, the Top-Echelon program was not all that well developed until the mid 1970s and with a couple of exceptions (Scarpa and Steve Flemmi), most of the "Top-Echelon Informants" were pretty small fish.
How many times do FBI indictments say things like "crippling" or "dismantling" this family or that one. Unfortunately some people are suckers and worship whatever the Feds say.
