Mile tracks put more emphasis on the driver. On the longer tracks, you can drive flat out all the way around, so it's more of an engineering exercise. On a mile, you can't run flat out. You're constantly in traffic, there's more driver involvement.
There's pressure all the time. It's stressful going to a premiere and having to look perfect, and everybody scrutinizes what you're wearing. It's scary. There's so much emphasis put on the physical.