Thanks all! At least, it seems it was an entertaining morning for many watchers.
@graeme: It is really hard to say, probably depend of the terrain. I would say that longer legs offer more possibilities to escape, as shorter legs usually means slower speed.
The World Cup in Liberec
, in 2011, was a great example to spread runners. You got a new map at the central control of each butterfly. The forking orders were according to your position at that point of the race = maximun spreading.
Though, I am not sure it would really make sense to have this kind of forking at the end of a relay.