The stuff I saw, the motorcycles were 25 feet in front of him.Maybe a better explaination of Contador's TT
http://tour-de-france.velonews.com/article/95744/cancellara-says-motorcycles-helped-contador
I have also noticed this year that the motos stayed pretty close to the leaders on several of the stages. All those guys make a point to ride behind the motorcycles.
Not much of a draft there...