Received my CCS adapter this afternoon, so I went up to the only Electrify America station in Charlotte, NC, after work. I wanted to see if I could pull more than 150kW, and Electrify America is the only non-Tesla provider that has options more than 150kW in Charlotte.
Unfortunately, I arrived with a relatively high, 40% state of charge. (I did remember to pre-condition the battery by entering the nearby Tesla Supercharger in my nav before I left home, and it was conditioned enough that the preconditioning was turning off and on.
I still pulled over 140kW for a couple of minutes, and the ramp-down curve seemed to hold higher rates for longer than a supercharger would at high states of charge. It was still charging at 80kW around 70% SOC. Even when charging stopped at 80%, it was pulling over 60kW.
Best part of all, that EA station was currently free to use.
The adapter is kind of clunky, because the CCS handle is clunky.
If you're interested in my stream-of-conscience commentary, here it is on YouTube.