No disrespect to Coach Flo, but in terms of technique,l Sydney is only marginally better than H.S. The only major difference I notice is Sydney being able to hurdle with her left leg, but she still runs high over the hurdles and she still chops. She still seems to be experimenting and for the most part, Sydney is great at the 400h because she is great at the 400 dash. In global championship races, athletes with poor technique tend to do worst.
Well, 400h races are tactical in major championships, so her "poor technique" probably won't be an issue if she runs near the WR!