Lewis i think was drugged to get under 9.9, with source being lewis, and that said i think lewis fairly clean prior for clean 9.95 . range.
the japanese are near that mark here and there, not nearly as prolific as Lewis.
all bets off with chinese, not to point fingers now, the swimmers are garbage though.
right now they cant do full gear with the testing, which is anabolics.
they do peptides growth test.,epo microdosing, and a hard hit gamble if you have no whereabouts failures .. you need some guidance with half life, and metabolic clean up technique. which are "legal"
it is only a matter of time before there is a ped to stimulate endogenous testosterone production, and hemocrit,
even bicarb will help in 100 after 60 meters, with an advantage of perhaps a meter.
9.8 appears to be the limit without full on gear.
which means the jamaican with 9.7, is on full gear some how.
its a really fun experiment.
except that fair play isnt a thing.