What evidence does Kafuku give for his claim that Misaki Watari is an "excellent driver" (9)?

Kafuku is pleased to find that just as his mechanic Oba had promised, Misaki Watari is a skilled driver. As evidence for his claims about her skills in driving, Kafuku notes the lack of sudden jerks he feels, the way in which Misaki Watari stays calm and focused even in the heaviest of traffic, and that when he closes his eyes, he finds it "next to impossible" (9) to tell when she is shifting gears.