During last years TdF final time trial, I remember Contador scooting back onto his saddle after 2 -3 revolutions of the pedal. It was extremely unattractive style and looked like he would be robbing himself of power....but he did well enough to hold his lead. Yesterday, watching Criterium Int'l, FSchleck was doing the same thing...although he had more pedal revolutions before he'd scoot his butt back again.