He's a good driver, not a safe driver. Unlike what we are told, a good driver isn't some idiot in a corolla who comes to a full stop at a stop sign. They can follow the rules but still be terrible. The M5 driver, on the other hand, is a great driver.
2003 BMW 325xiT "Audrey"
1987 BMW 325i "Lydia"
1990 Audi 90 Quattro Sport 20v "Chloe"