Yep, I was just going to point that out (having googled!)
It looks like "all five who have won the Tour at least five times, plus Fausto." So if you're going to include Fausto, why not make an exception for, say, Gino or Laurent? Or even Henri Cornet, who may not be famous but won the second TdF and remains its youngest ever winner (he was 20)?
Yep, it's a bit random. So I'd take out Lance and put in Henri!