You could imagine that owners of a more expensive car are more likely to use the original dealer for most repairs, and only seek a third party shop for very exp

You could imagine that owners of a more expensive car are more likely to use the original dealer for most repairs, and only seek a third party shop for very expensive repairs. Which, depending on methodology, might skew Your Mechanic's numbers. But that's only speculation given they don't reveal their numbers, methods, or sample sizes.