If you look at the question scientifically it's not possible to say who learns quickest from the available data. All the responces so far are based on personal observations and not on statistically valid data derived from from a controlled experiment.
Variables include
- statistically valid number of subjects
- skill of instructor (should be one instructor for all subjects)
- environmental conditions for learning
- past experience with kites
- age
- sex
- previous sports
- valid outcome (what constitutes an acceptable level of skill learned)
- cut off point for learning
If we control all these variables, and I'm sure there are more, then we can truely answer the question. "Who learns quickest - surfer or wakeboarder?"
Sorry for being a Smart A**e.