Crap 'Buzzwords'

Bit different from usual, but applicable I think:

Our new Sawtooth dimple design consists of 12 nodes that are precisely clocked to start aerodynamic shearing at a rate of 50Hz at a rider speed of 20mph,” says Zipp’s marketing collateral. “Sawtooth accomplishes this by inducing small sheet vortices that shed at a low magnitude, but at a higher natural frequency, thus decreasing the laminar bubble effect on the aerodynamically shielded side of the rim’s profile to further reduce high yaw drag and improve crosswind stability.”

http://cyclingtips.com/2016/10/zipp-404-nsw-carbon-clincher-wheelset-review/