Back to the thread ...
This is a good question. Very few people can do well without a good team. I would argue that it is not only their results you have to look at, but also how distracted others might have been by their teammates. Example - Astana, besides having an obviously strong team, had several threats and other riders had to be very careful who they marked and how strongly they marked that person, or they might risk blowing it on the wrong person. Astana had Contador, Armstrong, and Klodi, and until later in the race, they were all up there.
FWIW, I think Contador would have been hard to beat no matter what the team. However, I am not sure if I would agree he would still have won on S-L. On that team he would have been easier to mark, he would have had to work a bit harder all race (and that would have added up big time), and may not have been so strong in the final TT. Of course we will never know (unless he stays with what looks like an anemic Astana for 2010).
Lemond in '89 is a good one, because ADR was pretty much never there from what I can remember, even on transitional stages. Nowhere! Just Grego!