100km/hr would indeed be 32A 3 phase, though I'd be surprised (pleasantly) if all the chargers were able to supply that much, due to electricity supply limits in car parks, which of course were not built with EV charging in mind! 16A 3 Phase would still deliver around 50km/hr which is pretty damn good and a lot more sustainable for the car park, and allows them to fit more chargers in the long term.
However, I'm surprised that they're getting 55km/hr, because Tesla haven't released their three phase chargers yet (as far as I know). That means they'd be getting 55km/hr off a single phase charger, which tops out at 40A supply. I didn't think it would charge that fast, normally tops out around 45km/hr.