what moncoutie you're talking about? this one?
1. 2004: 55:51 Iban Mayo 23.10 km/h
2. 2004: 56:26 Tyler Hamilton 22.86 km/h
3. 1999: 56:50 Jonathan Vaughters 22.70 km/h
4. 2004: 56:54 Oscar Sevilla 22.67 km/h
5. 1999: 57:33 Alexander Vinokourov 22.42 km/h
6. 1994: 57:34 Marco Pantani 22.41 km/h
7. 1999: 57:34 Wladimir Belli 22.41 km/h
8. 2004: 57:39 Juan Miguel Mercado 22.38 km/h
9. 1999: 57:42 Joseba Beloki 22.36 km/h
10. 2004: 57:49 Lance Armstrong 22.31 km/h
11. 1999: 57:52 Lance Armstrong 22.29 km/h
12. 2004: 58:14 Inigo Landaluze 22.15 km/h
13. 1999: 58:15 Kevin Livingston 22.15 km/h
14. 1999: 58:31 David Moncoutie 22.05 km/h
15. 2004: 58:35 José Enrique Gutierrez 22.02 km/h
16. 2009: 58:45 Andy Schleck 21.96 km/h
17. 2009: 58:45 Alberto Contador 21.96 km/h
18. 2009: 58:48 Lance Armstrong 21.94 km/h
19. 2009: 58:50 Fränk Schleck 21.93 km/h
20. 1999: 58:51 Unai Osa 21.92 km/h
Apparently that list comes from here:
That 14th place is from a MTT in the Dauphine, which is incomparable to the 2009 results (when the climb was part of a regular stage). Of course, the simple fact that all 2009 results are way low on the list should already have tipped you off. Moncoutie undoubtedly peaked for the Dauphine, since he didn't ride the Tour and was considered a GC favorite. Riders like Lance would have taken it easy. So in the end we have:
- A very easy stage (21 km climb only)
- Which is only the 3rd stage in a race (recovery not much of a factor yet)
- Ridden casually by top riders who peak later on during the Tour
- Ridden very hard by Moncoutie who had stomach problems earlier and soft pedaled stage 1 & 2 (he was last in stage 1 & bottom 10 in stage 2). Stomach problems nixed Moncoutie's chances for a good GC placing, so he was in a fairly unique position: a GC contender being forced to hunt for stage victories during stage 3 by an 'injury' that doesn't hurt performance at all when healed.
I think that these are the perfect conditions for a very talented clean rider to rank highly on such a list. Of course, this doesn't mean that he was clean, but it's far from the smoking gun that you apparently believe it is.
PS. Fun fact: half of the top 14 on that list are from the same Dauphine stage. Despite ending up as 14th on the overall list, Moncoutie actually was only 7th during that stage. Take out the 2 MTT dauphine stages from that list and you lose the entire top-15, except for 1 person: Pantani. He was the only on who could climb at top-5 MTT speeds during a regular stage.