The Hitch said:Cycling is an stamina sport so top riders losing in January when they are furthest from their form and still tired from last season, to riders who are peaking for January, actually makes sense.
OK, lets do it a different route:
Diaz (& the others out of nowhere beating the hell out of 1-A pros in San Luis) is not good enough to have landed a pro contract. So I can safely assume he is less talented than a dom groupetto rider in Europe. So him going full speed he wouldnt be able to stay in touch with the peloton in summer of Europe... And then he comes out in January every two years to not only beat top pros, but destroying them? You really mean top pros are that much out of form? All of them?
Heck, AC won San Luis with ease a couple of years ago, right off the beach. And now nobody of the pros is able to do that?
No, sorry, I dont buy that. Thats too grotesque...
Much more likely (as Libertine said): Minimal testing in SA (thus card blanche for SA riders), while pros have to take care of their BP... Thats when you get absurd results like San Luis 2015