My wife found this interesting article while doing study. I thought I would share it

http://www.sciencedaily.com/releases/2004/05/040512044455.htm

Alan

On Sunday, February 22, 2015 at 12:48:28 PM UTC+13, kiwiindenver wrote:
> My wife found this interesting article while doing study. I thought I would share it
>
> http://www.sciencedaily.com/releases/2004/05/040512044455.htm

Zero surprise that the bumps promote keeping the flow attached at high angles of attack.

Very much doubt that they'd decrease drag at low to zero angles of attack e.g. improve best L/D.