[QUOTE=mmandley;212762]

General rule of thumb, the lighter a board is the faster it is in the water, and the more expensive a board is the lighter and faster it is in the water.
[QUOTE]

you need to ride more boards . . . . .

The shape and buoyancy are what make a board go faster. Fins also make a difference and quad fin or twin fin set up will offer more speed on a surf style board because there is no fin down the middle like a thruster that holds it back a little.

Flyboy (Jeff & James Walker) do a ton of prototyping of boards. Sometimes technical, but always entertaining read:

http://flyboywakesurf.com/

While these were written specific to traditional surfboards, the terminology is basically the same for wakesurfers:

http://www.islesurfboards.com/surfbo...damentals.aspx
http://allaboutsurfboards.com/surfboard-bottom/