There's a copy of the short article on it by Vic Willoughby here:
http://www.eurospares.com/graphics/aero/Dreamliner.pdf
Built in 1956 the data table at the end shows that aerodynamics can have a significant effect even at 30 mph. Many people (probably not here) seem to presume you've got to be going 50-60 mph before getting any benefit from improved aeros.
cheers,
Michael