It isn't just shorter recovery times, it is also:
lessened fatigue and increased stamina and endurance.
increased
mental
acuity and endurance
Consider that even
video gamers
are starting to discuss how to regulate PED's, you know that certain PED's aid in this way. Take Adderall, for example. In 2012 there were mopre NFL suspensions for Adderall than any other drug, and Adderall is specifically designed to help increase mental awareness.
Lance Armstrong also claimed to have pushed for stronger testing, and he sang from the Mountains he rode on that he was the most tested athlete in the world. He is a primary reason I stopped listening to athletes claiming innocense on this subject. Too many have cried wolf to fall for that nonsense.
BTW, the Tour's version of PED testing is a joke. In Feb. 2013 54 Tour players, 25% of the Tour, were asked when they were last tested "off site". Turns out none of them had ever once been tested "off site". Contrast that to any NCAA or Olympic athlete. I love Golf, but the Tour's testing policies are a total joke.