There are charging points and charging points. The Tesco located points that VW sponsor are "slow" or mostly "fast" chargers. These are designed to slowly top you up while you are busy doing something else for a few hours. They are typical the same speed as you would charge with at home - 7kW. If I go to a store with one in my EV and will only be there for 5 mins, I would not bother plugging in. However, if I would be there for 30 mins or more (many allow you to stay for up to 2 or 3 hours) then its worth it. 2 hours would get you of the order of 60 miles additional range (about 30 miles range an hour)
Rapid chargers are a different breed. They range from 50kW to 350kW. Almost no cars can take advantage of the ultra fast chargers yet, but some do better than others. 50kW will add up to 220 miles in an hour. 150 (the max my car can use) over 600 miles in an hour, 350, well over 1000 miles in an hour. You pay for the connivence of the speed.
Slightly ironically - the faster the charger, the longer you spend waiting to charge. If you are on a slower charger (at home or a top up at tesco), you start your charge knowing you have ages before its full. You are not waiting to charge, so much as doing something else while charging is happening. I NEVER wait to charge at home, the car charges while I am doing other things (mostly sleeping).
If the charge is rapid, I want to be around when it finishes so I can let someone else use the spot. for 40 or 50 mins, that might be having a coffee or taking a walk or eating somme lunch. If the charger is fast enough I might just get time to pick up a takeout coffee. By the time you are down to 10mins or less, you are back to the waiting to fill like you do with petrol. Its 10 mins just dedicated to opening the cap, setting up the pump, filling, closing up and paying. I love slower charging - especially at home!