In article ,
A Guy Called Tyketto wrote:

Best case in point: winglets. Airbus, with the exception of a
very aircraft in the -100 family, were delivered with winglets, long
before Boeing caught on and was able to offer them to the 737 and 757
family. From that alone, Boeing was behind the curve on reducing fuel
consumption. Like I said earlier, you may want to read up on the facts
before saying something you can't back up.

The definition of "winglet" you are using to describe the things at the
end of the Airbus wing is a little on the thin side. Compared to the
"winglets", tipsails, whatever a given manufacturer chooses to call
them, that Boeing uses, the Airbus endplates certainly do not provide
the same aerodynamic advantage.