My observation is of the extended history of the 100 m hurdles going back to the 70s and 80s. When you do that you’ll see that there are only two none European women, Devers and Hayes, who have run under 12.40 in the 100 hurdles. All of the others are Eroupean women. And, the all time top ten times belong to Europeans women as well. My point is, European female hurdlers have better technique, therefore they by-in-large out perform American and Canadian 100 m hurdlers. And, you can add African, and Caribbean 100 m hurdlers to the list as well.
Relentless