Lance Armstrong... greatest doper there was or ever will be

You have to wonder how the sport needs to move forward. A purge? In which case you decimate the ranks of the peloton and others in the team, or amnesty for those come forward, bring everything out into the open and make sure the sports moves forward clean. We know the peloton is slower so doping is less prevalent, we have characters like Vaughters (someone I do value) saying the peloton is much cleaner, we can hope that the exposure of Lance's cheating should discourage anyone seeking that way to achieve success

Regarding the peloton being slower... Testing is better meaning levels are stricter. For example you can't get a massive hit off EPO and expect to get away with.

A cynic would say this means riders are doping less, and not that less riders are doping.