Lawrence Cherono, wins this, IMO. He is 31yo and ranked 4. Won Boston in the spring in 2.07.57. He reached halfway in 1.04.28 in a pack of 22 spread across 14 seconds. His best time was last year in Amsterdam, winning in 2.04.06. the first three 5k splits were 14.33, 14.35, and 14.55. Halfway there was 1.02.11 in a group of 11. He ended up winning by 31 sec over Mule Wasihun. Cherono was 7th in London last year as well.