i had a go on 9'10" x 30" sup (kinetic energy board in the photo above) today with a 6.4m KA kult at the caloundra bar.
swell was tiny and wind was only 5-8 knots.
what an awesome time

, i wanted to compare a sup against a 120lt wave board to see what the difference was but the wind was so light that the 120lt stayed on the roof of the car.
i can really see the value of the longer board.
compared to short boards the sup's pop over the wave without losing direction or snaking in light wind. somehting a short board can't do.
catching waves was also a lot easier than what a short board would have been. the acceleration on small waves was insane. the glide ability of the longer boards is a winner when taking off.
the other thing that impressed me with the longer board was that the extra tracking ability when heading back out was well worth it. side chop wasn't even noticable. on a short board i would have been in the drink.
unfortunately the waves were very bad so i can't comment much more than that. i'll hopefully try again in a couple of weeks time in some better surf, or at least something where i can string a few turns together. thinking neil st.
my initial reaction is that the length is definately worth it in the light winds in the conditions we usually get in qld.
but the sup was so much fun, and with one i would never miss a days sail. today the formula kit would not have planed but i spent 1hr riding waves/swells then heading back out through the break with a 6.4m sail.

at a guess the shorter large style wave boards may be better in classic, point break conditions where the rider is wanting to be more dynamic on the face and in the air. i'm happy with the sup......