Charging speed will vary a bit depending upon the particular charger and how busy it is. According to the Ars Technica article I posted, this particular vehicle supports a peak DC charge of 120 KW and should charge from 0-80 percent in under 30 minutes (that claim seems unlikely to me if the peak charge is really 120 KW, but I'll take it face value for now).
As a general note, EVs have to control the charging speeds to limit damage to the batteries. They can charge faster the more "empty" they are. Charging on a DC charger will go slower for an EV when the battery charge is above 60%. The particular charge curve will vary based on manufacturer and battery chemistry. A peak of 120 KW is fairly slow for a DC fast charger. 170 KW is pretty ubiquitous at this point. Some vehicles and chargers support much more, with 400 KW becoming more common.
Edit: Sorry, I ignored the price question. Price depends on which state you're in, but generally speaking DC fast charging costs roughly the same as filling up at a gas station on a per mile basis. It can be a little bit more or little bit less just depending on current gas and electric prices.