I just charged with my Kia CCS-to-NACS adapter at a 350 kW EVgo station with a 68% state of charge, and I maxed out at 96 kW before dropping to 70 kW after I crossed 70% state of charge. This station has NACS chargers tho, so I'll have to come back here some time when I'm low and see if I can hit 235 kW peak as promised.
I'm not sure whether this was a state-of-charge issue or an adapter issue or a charger issue or some combination.