The reason because Silas wins in Monaco and Berlin is not that he didn't want the winner from another Country, but is that these two races were very fast. Silas has a very high AEROBIC POWER, superior to the most part of other specialists (last year, being weaker than this year, he ran 28' flat in a road race of 10 km in Tilburg). His training presents a very high volume (for example, he went for 5 x 800 in 2'02" + 5 x 600 in 1'29" + 5 x 400 in 58" 5 x 200 in 26" / 27", using recoveries of 3' between 800m, 2' between 600, 1' between 400 and 200m, for a total volume of 10 km), or very short recovery (last training before going to London was 6 x 400m in 56" / 57" / 54"6 / 55"8 / 56"5 / 56"2 with 50" / 60" recovery (100m jogging) + 6 x 200m in 26" with the last in 25"2 with 40" recovery, in the track of Chepkoilel). However, he is not very fast, and cannot have any chance with athletes as Asbel Kiprop or Laalou in case of tactical race (like in African Championships).
In Berlin, he showed good personality, starting to understand a different way to run.
In the history of the event, the strongest specialists always preferred to go in front in the last 500m (Morceli, Aouita, El Guerrouj, Cram), and Silas must follow the same tactic.
Personally, I think he can become a very strong specialist of 5000m, too. That's the reason because his plan is to run 1500m in Lille tomorrow, again 1500m on 29 in Rieti, and after to prepare for running his first 3000m in Milan (9.09), where the scheduled event was 5000m, but now was changed for giving Silas the opportunity to run about 7'30" in his first attempt in something longer on track.