No, I have not noticed that. In fact, that's about as false as statements get.
In point of fact, the winngest dogs in history don't have a drop of RBJ in them.
I don't think they produce the most devastating killers either.
Queen of Hearts,
Molly B,
Shady Lady,
Tornado ... not a drop.
The absolutey baddest crosses with my own line were to Eli, Chinaman, or Coca Cola dogs.
Statistically, there are more winners with Eli blood and/or Bolio blood in them than RBJ.
Bolio/Eli, Bolio/Boomerang (and even Jeep/Redboy dogs) have ALL been been major, dominant forces out there also ... with not a drop of RBJ.
And let's not forget the avalanche of awesome, multi-winning Jeep/Rascal dogs too ...
I do agree RBJ dogs are an undeniably great, very consistent line of dogs though. Absolutely.
But they sure as hell don't produce "all" the good ones, not by a longshot.
Jack