But a full charge takes more than 15 minutes, right?
Yes, but that's not the relevant question. Charging time spent waiting was less than refuelling time spent waiting.
Most of the charging time was spent having food or doing other stuff, all of the refuelling time was wasted.
IMO it has to be as quick as a gas pump, otherwise it becomes inconvenient for anyone who doesn't charge at home/work.
If you can charge at home, at work, at the supermarket, at restaurants, at the movies, etc. then you'll never have to stop specifically to refill outside of long roadtrips ever again. That more than makes up for the rare occasions when you want to do very long distances in very short times, cutting short human breaks in favour of speed.
Gas pump speeds are irrelevant when you pull up, pump, walk inside, pay, walk back, pull into the next lot, go have food, go to the restroom, drive on - how fast the "pump" part is doesn't matter much for the overall time spent on the stop.
With a BEV you pull into the next lot, plug in, go have food, go to the restroom, drive on - less time spent.