I'm sure it would be, and they wouldn't even need to drive the Prius any differently than the HCH. I'd guess that in 'average' driving (the way most people drive), the HCH would win, while with 'careful' driving (in both cars), the Prius would win.

The question then is, are we ready as a nation to change the way we drive so that we can take full advantage of the new technology?