Swapping boards with Mario at southend the other day it was noticeable the difference between the single fin set up and the single and side fin set up of his board. Personally I like the smoother feeling of the single but the small side fins give a sense of the thruster power and drive mid turn.
Mario on Pam's 9'1" single fin.

Ray Lawrence is our hero team rider on longboards, although he can ride anything that will float him. Rides a 9'1" like a 6'1" but with all the traditional moves as well. People always metion how well he surfs, just one of those surfers it's a pleasure to watch.