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.

On a different site someone reminded me that I probably didn't do battery conditioning first, and they are correct! 🤦🏻‍♂️. I wonder if that would explain such a big reduction tho. I'll find out on my next road trip
@heathborders NACS (Tesla) chargers are way more convenient than a CCS to NACS adapter. I tried using mine at an Electrify America at IKEA and eventually gave up and just used the Teslas nearby. I didn't pay attention to the charging rate, though.
@skovatch the adapter worked great for me. My main issue with Tesla chargers is giving Elon money, and my second issue is Tesla chargers don't support the 800V architecture in my EV9, so I only charge at half-rate at them