Can't see Felix being beaten at 200 . Jamaicans will indeed make her work for it , but now that she has abandoned her flirtation with the individual 400 she just looks unstoppable to me.
You have to feel sorry for Kimberlyn Duncan, who has been overlooked for the relay pool. She finished 4th in the trials in w200m and is world-ranked 5th on time (SB/PB 22.19). Over 100m she is ranked equal 7th with her 10.96 SB/PB (but didn't enter this event at the Trials in order to concentrate on what she considers her stronger event).
She's an experienced relay runner: her team (Louisiana State University) has run 42.68 this year, with two further sub-43 times.