I have as far as I'm aware the cheapest 800v car on sale in the US (Hyundai Ioniq 5) and in the right weather conditions a 20-80% charge is legitimately 10 minutes.

The weather conditions do unfortunately matter. Travelling during the post-Christmas blizzard last year was very much less than ideal. The battery heaters in my car could not keep up with how bitterly cold and windy it was and I had multiple 30-45 minute charging sessions because it wasn't ever warm enough to accept more than ~120kW.

I'm looking forward to traveling with it in the warm season and seeing how things compare.