Midship cars are often setup to have slight understeer, and because of the weight distribution not often will you see a midship car get wildly out of shape unless the driver is inducing it. "skittish" is a term when inexperienced journalist who seldom drive quick responsive cars run out of talent.
I agree with what JJ72 said, the only reason the Enzo was oversteering was because the driver was purposefully making it do that. Some corners he'd turn in slower then boot it right at the apex. Even if the Enzo was the best handling car in the world, doing that in a car with that much power will cause oversteer.
At no point in that video was the oversteer unexpected, the driver knew exactly where the limits of grip for the rear tyres were and he was just playing with them.
And thanks to the link of the Enzo at the Ring JJ, that was fantastic! Shows the real capabilities of the car.