Some guy over at the Dailypeloton claims that by his quick estimates the numbers are way down (like ~6 watts/kg on the climbs rather than Armstrong's magical 7 watts/kg). He said he'd do a more detailed estimate later but I don't believe he has.
Power outputs in mountain TTs/mountain top finishes has been dropping. 2007 was slower than 2006, and 2008 was slower than 2007 in terms of watts/kg that the riders where putting out. Having said that 2008 was a really hard course, 2007 much less so. 2006 was pretty tough course wise (not as hard as 08), but it was won by an E.T so you can expect rediculous watt/kg scores.
BRUYNEEL: "We've found that cyclists with lower mass inside their head, climb faster. We ask them if they have ever doped and look into their eyes. If they say "no", we know their brain mass fits in with our selection criteria".