Keep in mind that the riblets I mentioned are definitely not dimples. I agree with the Unlimited Hydro analogy rather than the golf ball one. As one reason why, consider that the golf ball is spinning, so the dimples are being used for lift as well as stability - quite different than what we are looking for. In this age of the airlines looking for any fuel economy that they can get and the military looking for any performance benefits, I truly believe that if dimples were the way to go that we would be seeing dimples on the wings of these planes. Air is a fluid just like water, only thinner!