I thought about that too when I was reading charlie’s manual. It was hand timed that could be why she ran sick times (could be other things too) I think that year she ran 3.5 her 100m time was 11 low or something… But then again PJ told me that olusoji fusaba can run a 3.4 from the blocks… So I mean it could be the person timing or whatever who knows…
I dont think you can really get anything from these charts unless you have fancy timing equipment and factor in reaction time. If you really REALLY want to know what you are capable of you need to go to a meet with FAT.