Will this be the year defense wins?

I have observed before that defense is what insures a good season, but come tournament time, you have to have offense. Virginia is riding what may be the toughest team defense since the days of Bill Russell at San Fransisco. And, of course, they have faced the best in the ACC, so they are battle tested. But when crunch time comes, can they press the accelerator, or do they only have brakes? Will this be the year defense wins?