Which EV can go 500 miles on a 20 minute recharge? Hmmm????
That's not what they said. Try reading it again.
But to answer your question, and to use the Tesla Model S as an example, you can get 200-250 miles-worth of charge (50% of 400-520 mile capacity, depending on model) in 20 minutes on a Tesla Supercharger, which is what is available on the rural routes.