So...I can't believe nobody has mentioned this yet (at least I haven't seen...sorry if I missed it), but how much time did Cadel "leave on the course" by having to run just a Campy Bora 50mm deep front wheel vs. Sastre running a Zipp 1080. From what I could tell there was a moderate amount of breeze so performance at "yaw" could be a factor.
Hmmm...according to this testing linked below, vs. an 808 he was giving up around 7.5W. Let's say it was 10W for a 1080. That would make it 53 seconds closer, or only 12 seconds off the podium. Ohhh, so close...I wonder what tires he was running...
http://www.rouesartisanales.com/article-15505311.html
http://bikeblather.blogspot.com/