hello
i'm not completely agree. i fly an 2005 hawker 800xpi proline21 with AP winglet.
this are the benefit 1)climb direct to FL400 or FL 410 2)fuel saving 7%
starting after 3 hr in the air 3)increase of the second segment of 1100lbs
and 4)increase of crosswind component from 30kt to 34 kt.
maybe you don't need the extra 180nm in range all the time,but in a 1000nm trip you really see the differents in fuel burn.