Regional races are nothing more than prelims. Experienced runners like Pamela Kosgei know the goal is to advance with as little effort as possible. Kosgei held back because she was in a secure position and she knew her team was likely to qualify for nattys.
Jane Hedengren made the typical freshman mistake of running hard in a prelim. No reason to run as hard as she did. Completely unnecessary. She will probably pay for this mistake at natty next weekend.
Don't say I didn't warn you.