Exactly. I don't disagree with the points that others have made in response to what I wrote, and I can admit that I don't know enough about the breadth of 'doping quality improvements' that there might be in the sport, or first hand information of how much doping can improve performance, to draw a really solid conclusion about any of this.
My point is that Spain is largely on top of the world rankings because of their 2 (or 3, if you count Sanchez, which you probably should) biggest talents, who are very, very good at winning bike races. Assuming that doping is not uncommon in the peloton today (and I have enough cynicism to definitely believe that), and that the differences in the quality of dope that various top riders might get is not too huge (this is the one that's stretching it, I really don't know), Valv and Contador are above the rest, on a (somewhat) level playing field, and this is skewing the rankings towards Spain looking good in general. Every contextual bit of knowledge I have points to more of a laissez faire attitude in Spain towards individual riders doping, so it's possible that it's more widespread there, and it's possible that it makes a difference in their results in general in the past 10-15 years. But I'm just saying, if they're head and shoulders above the rest, I don't think it's all due to way better and more widespread doping than other countries, but at least partly to the fact that they have some really dominant riders at the moment, doped or not.
With regards to France, I'm not sure that the opposite argument applies, namely that they just don't happen to have a few talents at the top of the game right now. France has as rich a cycling history as any country, comparable to only Italy and Belgium with regards to both great champions and depth of great champions. Yet who of the current French riders has the most prestigious palmeres? Honestly, think about it. I really think that it's Christophe Moreau, and no one would compare him to anything more than a moderate talent who has had some success in some good races. Really, who else? Chavanel? Moncoutie? Fedrigo? Nobody from France has won any monuments or GTs in a good number of years, or even podiumed in GTs, as far as I can remember off the top of my head. There is nothing that I've seen to explain this ridiculous underperformance from the country with arguably the richest cycling pedigree in the world, other than that they haven't kept up on the dope. It doesn't seem like French fans are any less rabid about cycling (although the general public seems to have cooled a bit since Festina), and it doesn't seem like they aren't producing as many pro-quality riders. Nothing seems to be wrong with the system except the possible explanation that they're behind in doping.
I hope someone who has more in-depth knowledge can back me up or prove me wrong, because I'm just some guy from Canada who's reading between the lines of everything I've absorbed in my last 5 years of cycle fandom.