I'm with you Scott, I can recall many ponds that have overpopulated and stunted with LMB (and even CC), but don't remember any that went that way with BG...Not that I've spent alot of time at alot of ponds. Just saying. I think that the high tendency for LMB to overpopulate reduces the likelihood that the BG will. I do believe that if a pond was just stocked with BG you would see that's it's not a myth, but I have know no one to just stock panfish without LMB.
