Can't bullshit a bullshitter =) I ran pharma (had a source that snuck em in from overseas) drugs for a 2-3 year period and I know what they can do for gains. Recovery is one component but the biggest gains are due to an increase in nitrogen retention in the muscle anywhere from 2-4 fold depending on what drugs are used and doses. Blood circulation to the muscle increases dramatically, that is why when guys are on their veins are bulging out and are the size of a fountain pen.
The nutrient partitioning effects are also massively increased; therefore, guys that are on, can eat far more protein and cheat meals and not only stay leaner but add slabs of muscles at a faster rate.
*I'm not saying it's all drugs, but there is a reason every BBer runs a plethora of drugs....THEY WORK! To say it only benefits recovery is an out and out lie I'm afraid!