Who's faster? A roadie or a mountain biker?

A while ago, they did a test of who is a faster rider, a road biker or a mountain biker. They chose Andy Schleck(last year's second place Tour de France winner), and Burry Stander(mountain bike under 23 world champion). The course was in a ski resort in Spain. A 7.4 mile pavement climb and a 5.5 mile singletrack climb(steeper). The riders would race each course individually and their elasped times up both of the climbs would be added together. The rider with the lowest elasped time would be the winner. They each had their own Specialized mountain and road bikes. Weather conditions were less than ideal, with high winds, cold temps and sporadic rainstorms.
The winner was the mountain biker. Burry Stander's 36:29.8 road stage time was less than a minute shy of Andy Schleck's winning time of 35:47.8. Burry powered up the off-road climb in 36:39, distancing Andy by almost ten minutes. Andy said he had more fun on the mountain bike than on the road and is planning to get a mountain bike of his own.
So, on paper, mountain bikers are in better shape than roadies, in my own opinion, when I am training on the hilly trails, it is higher in intensity and I can get in better shape than I could on the road. On the mountain trails, the pulse is high and you have to use technique to get up.