Whoa, all I said was that 10.49 is not a reasonable result by which to make a comparison. Of course she was a terrible cheat. No doubt why she's no longer with us. But for your analytical purposes, I think her fastest wind legal time is 10.61. Still faster than juiced Marion ran at altitude, and significantly faster than Arron's likely legit 10.73. That's what I was sayng. Of course FloJo was dirty. Goes w/o saying.
The point about Hall and Johnson: both Americans, former NCAA champs, both very good, both come from coaches/training groups with no positive tests. The only differences I'd say that you could point to would be: 1) that Johnson was almost unbeatable (which I would say is easier in a sprint than in a half marathon) and 2) for much of his career, he was not subject to an EPO test, and he retired well before any HGH test became available (which are both important points). But the interesting thing for me in all that is Wariner. He's pretty much just as good as Johnson over 400m, and comes from the same group and is in fact subject to all those additional tests that MJ never was. That says something to me. And, the fact that Gatlin was busted, the King of track and field and Nike's boy is especially important in that no one, no matter how big, is safe (anymore), the fact that he was busted in America by USADA and that he was Nike's guy (given that Nike owns a lot of the guys in USATF) all meant a lot. Nike would love to take Wariner down (which why they signed 19-yr old Merritt in the middle of the indoor season after he broke 45 indoors) and if Gatlin didn't get a pass, neither is Wariner.
See where I'm coming from?
As far as access, sure, there has been access to drugs (I would say easier access in the western world than in east Africa) but it's not as simple as drugs are available=everyone is using them. A lot of people justifiably look at Jos Hermens with suspicion (he used drugs in the 70s) but (I think) unfairly extend that suspicion to ALL his athletes. Jos managed Meb, Suzy Favor, Sarah Schwald, Jo Pavey (I think), and do we really think that they're cheats because of their current/former manager? I think he may have played some role in facilitating some of his athletes (the Europeans) but not his Ethiopians. In my experience, the talent is so deep in the country around Addis and the culture so opposed to anything like that, that I don't see it. Plus, there are Ethiopians with zero connections to someone like Hermens (Defar and Dibaba, for ex) who are truly world beaters and thus that should serve as evidence that it is possible to be that good.
There's something special about East Africa. The fact that Ethiopians have the highest genetic diversity between individuals than anyone else on the planet (because that's where man evolved, and it was smaller, less genetically diverse groups that left for Europe, Asia and the Americas who then populated the rest of the world), that there seems to have been an evolutionary change in their blood due to thousands of generations at high altitude, etc.