Like GH, I long ago adopted the mindset that everyone is doping. That way you supposedly can't be disappointed. Although I usually am.
If doping improves performance, then surely it is only logical that the athletes with the best performances are more likely to be doped. I am not remotely surprised about Tyson Gay, as he looks like he tried everything to be fast - his body looks abused, not healthy. Powell doesn't shock me either, although I didn't think he was so obvious as Gay.
The signs of drug use are most obvious among the women, and there are no top level female sprinters I would discount from suspicion. Either they have prominent adam's apples, masculine physiques, or the sort of androgynous appearances that you just don't see in everyday life. Or in some cases all three! So Veronica Campbell Brown doesn't surprise me either.
The thing is, I liked all three of them, and part of me will be sorry to see them disappear from the circuit. Have to say though I am less sorry to see Gay go, as his "I put my faith in someone and they let me down" patter seems designed to put the blame on someone else and absolve him from accountability, which is highly unlikely. I wish he would have said "I know what I did, I take responsibility for it". I think Gatlin and Lashawn Merritt would be more popular if they'd had the guts and the character to be honest and admit they knew what they were doing. Marion Jones is the supreme example of this self-serving hypocrisy, which is why she's maybe the most hated athlete of the last 20 years.
I wish these people would follow the example of Angella Issajenko, who admitted doping, explained why she'd done it, and told in great detail what it involved. If the other dopers did the same, maybe our sport - and ultimately, others - could finally come clean about the realities of drug use and face the issue openly, instead of the facade of the current situation.