Acutally, the run in that video is 8.5 miles because he started at the Overlook. The parking area down by the brigde is mile 0, the Overlook is about mile 2.5 and the TN/NC state line is mile 11!
Now, for comparison, I have been watching a LOT of YouTube videos and did some homework. (I don't have a girlfriend, so I have time for stuff like this...)
Dragon Run Times
On four wheels
Full run (11 miles) Note1 /
Overlook to State Line (8.5 miles) Note 2
Jason and Nick 15:25 / 12:20
Eryk of the Gencoupes ---- / 12:57
My Moderate Run 16:45 / 13:17
Micheal's Tourist Run 18:45 / 14:29
On two wheels
Overlook to State line Note 2
Honda CBR1000 and Motard 11:14
James Scott S on a Speed Triple (Gary's Video) 11:34
"NOTE 1 Times are from when the car/bike crosses the east edge of the parking lot pavement down at the west end by the river to the state line fence, just up the hill from the Gap."
"NOTE 2 Times are from when the car crosses bewteen the two parking area of the Over look to the State line fence, just up the hill from the Gap. For the Gens and others who start there, time starts when the car/bike is completely in the lane and acclerating away."