The way I read that is, Lemond by using the words "could be" instead of "is" suggests that he thinks Contador might have been doping. Or is it just the English language, that can be easily misinterpreted one again, bring back Moriniho
Don't be hard on yourself. I would say that interpretation is a fair one, nothing 'mis' about it. Whether LeMond intended to imply that he believed Contador to be a doper is another story, but that interpretation is definitely there!