I think it’s way less than that. We just got back from a ~1600 mile round-trip to visit family plus a week’s worth of incidental driving around town to buy groceries and visit other family nearby.

On the highway segments, most cars were just trundling along between 2 and 20 mph over the limit, generally keeping reasonably to themselves. When an obstacle appeared on the roadside (stopped motorist, police, other), people flexed to let other cars get left and then returned to normal driving.

Sure, I noticed a few people driving aggressively, following too closely, changing lanes excessively to squeak out one or two extra spots, but that was perhaps 50 cars at the very most in 1600 miles of driving. 1 or 2 per hour, not 1 per 20.