What separates the Genovese from the other families is not the total number of informants, they have a bit less, but still plenty. It's the amt of damage done. If Nigro had flipped a lot of damage would be done. But he didn't.
Feds never get so far up the latter like Bonanno or Colombo.

Speaking of John Biello, why the hell was he killed? Half my sources say Joe Bonanno ordered it, but why would any family be cooperating with Bonanno after his big plot was revealed? And if George Barone did the murder (Genovese soldier) wouldn't he be doing it on behalf of his own family...?