I thought I would put some of this in perspective as it relates to Saxo Bank/Leopard Trek, though we could perform this exercise with all of the teams. I looked up the race days, kilometers raced and CQ efficiency (CQ pts/kilometers raced) of the mountain domestiques and GC candidates for both:
Saxo Bank Race Days KMs CQ Eff
Alberto Contador 44 6,936.1 24.13
Jesus Hernandez 42 6,690.6 0.63
Dani Navarro 42 6,690.6 0.82
Ritche Porte 55 8,053.9 1.45
Leopard Trek
Andy Schleck 46 7,024 6.86
Frank Schleck 42 6,419.5 10.73
Maxime Monfort 42 6,487.3 4.47
Jakob Fuglsgang 51 7,688.2 4.46
Now what this says to me is that even though Saxo's domestiques have logged more miles, they've not been finishing high up and going into the red. Comparatively, Maxime and Jakob have ridden their kilometers much harder in the sense they've produced significantly more CQ points in slightly fewer kilometers. I come to that conclusion by comparing Andy and AC. Andy's ridden more kilometers than AC, but the CQ efficiency tells you how those kilometers were ridden. In Andy's case, mainly not for points. Whereas comparatively speaking, AC is essentially ALWAYS going for the win or placing highly.
Nothing very scientific and definitely open to interpretation, revision and discussion, but I thought it would be interesting to look at some data points to fill in the discussion.