2012 Vuelta a España - Tour of Spain

it kind of shows how well the drugs worked back in the day

some one gets a shot in the arm at the start of the day and hey presto they ride like men possesed, gapping all comers

now without the chemical advantages it shows how close the top riders are, more like formula one gaps and fractions of a second rather than minutes

This is a view you hear from people who'd like you to think that doping's not really a problem any longer. It seems simplistic to me. Testing that occasionally works now means riders are less likely to completely take the piss with huge amounts of EPO resulting in the dramatic riding. There are still lots of ways to cheat, some simple and some clever and more than can be tested for. To state Contador and Valverde are clean because they're having to race hard to win is probably naive.