Almost certainly terrifying.
Even automotive journalists, who get to drive a lot of exotic machines, don't often drive something like this. The car in this video isn't just an Audi E-Tron Quattro, it is the exact one that won the 24 Hours of Le Mans this year, and it has the dings and dead bugs to prove it. Evo writer Richard Meaden was given the extremely rare opportunity to take the car out on the track for a couple of hot laps recently, and thankfully shot some video of the experience.
He obviously didn't push it quite as hard as the pros do, but that's understandable. The car is like nothing on the road, and his impressions of it won't help to inform our car buying decisions, but we absolutely do not care.