ASI, sorry, shouldn't have made the blanket statement that only Cuban's posts were correct. I was referring to the posts that implied that winglets would eliminate vorticy.
As to the mention that the BBj "only gets about 4.5% to 5.5%" more efficiency out of winglets, obviously someone has missed the fact that manufacturers will do what they can to tweak 0.5% improvement, let alone those numbers!
As to the 777, I stand by my original reasons for it not having winglets...so far.