It's all about the one fast lap at the time attack, so drivers tend to go 1 fast, 1 cooldown, 1 fast, 1 cooldown lap patterns. So some of the laps he's is just cruising, some he's going harder. Coming out of the corners, he'd be careful with the throttle because with the power it's putting down, it's easy to just light up the rear tires which is fun to watch but isn't the fastest way through the course.
So, yeah, you do have quite a bit of throttle control available in corners with a turbo setup.
