I am a fast sailing catamaran in beam reach & downwind conditions. I was recently clocked at 13.4 knots (5 min sustained) under my 270 sqm asymmetric spinnaker. At present I only have headsails (270 sqm asymm, 170 sqm gennaker & 70 sqm storm/stay sail) so I don't sail much upwind.

For upwind I use my electric motor and diesel for longer distances or heavy conditions.
I may get a mainsail in the future to improve my upwind performance.

Normally the headsails are deployed one at a time but it is possible to wing on wing as you saw in the photos. I'm not yet sure whether it provides better VMG than reaching with the spinnaker. But it looks cool.

Check out my earlier posts for more details.