The footage was towards the end of a long on the water session with coaching from the rib. During this time, significant changes were made to the rig set up (loads more kicker) and the T foil - use less. Each time, measurable improvements in speed occurred.
I think there is still some work to do on the jib sheeting, which may give more height at no loss of speed. Since the predicted upwind speed in waves was 11.2-11.5kts in waves at 23 deg awa and that was very similar to that measured, I doubt if the boat will go much quicker uphill, except that is, in flat water. You are limited by leverage. That said, that's a bit quicker than a 49er, but I suspect at a lower angle.
Downhill, I think there is still a lot to come. The boat should be capable of around 25kts in about as much wind. It's all abut trim angle.