Hell Monty ran 9.96 PR on grass. It totally depends on the track
https://www.abc.net.au/news/newsitems/200209/s676481.htm
That article reads pretty funny, knowing what we know now. I particularly enjoyed:
"'I ran six times under 10 seconds in '97. And I am telling you right now I trained three times a week.'"
(Related to what Mike has said about doped up medalists being able to get away with less than perfect training)
"After Montgomery's training partner Marion Jones clocked 10.88 in the women's race, Montgomery felt he could run fast."
(Because he was on the same shizzle)
"He ran in lane five, the same as Jones, and even used her starting blocks."
(Did they use the same lawyers?)