I have to check the stats later, but generally, 1 Kenyan does well, and the other 2 "bomb", fading hard in the last part of the race as they drop of the pace, no longer can help their strongest compatriot, etc. 2 Ethiopians run well and are in the hunt. 1 wild card (Etritrean, American, etc).
BUT, that doesn't matter so much. What matters is that Solinsky has shown he DOESN'T NEED for the Africans to have an "off" day to beat them. Chris can beat just about anyone in the world on their good day. Maybe there are still about 5 people in the world who on their BEST day, Chris never beats, but the chances of 3 guys having their best day will be rare.
Chris just needs everyone to have a good day and he can beat just about anyone.