Here's my take:
Jepchichir doesn't want to play around here, like Chepngetich didn't want to play in Chicago. The Americans in the field won't be expecting such a swift pace, and will hope to reel her in. But no, that won't happen. Because she's Peres fricking Jepchirchir. Molly Seidel sticks with her for a short period of time before getting passed by the charging group of three - Johannes, Yeshaneh and Aga, who will slowly seperate and spread out along the course as the finish line draws nearer. Seidel completes the race as top American, but Sally Kipyego is less than a minute behind her. Full predictions:
Peres Jepchirchir 2:21:26
Helalia Johannes 2:23:03
Abel Yeshaneh 2:24:48
Ruti Aga 2:25:09
Molly Seidel 2:25:37
Sally Kipyego 2:26:12
Kellyn Taylor 2:27:47
Laura Thweatt 2:28:38
Stephanie Bruce 2:32:49
Just my take, expect this to be quite wrong. If/when the full fields come out, I'll probably change this sometime.