A Gravel bike gets 18th all-time descending Palomar Mtn South Grade

Steve Driscoll posted this video descending Palomar Mtn (South Grade) on his 3T Exploro with 650x42 IRC Boken Plus tires. He got 18th place all-time, which is amazing considering the Tour of California rode this route, and with the road closed, they were able to use both lanes. Who said a gravel bike can't be as fast as a road bike?