Have you really seen real swarming in Fasttrack?
I know that Mojonation use swarming, if you mean lot of small segments that's circulating around the network, like some some sort of mirroring.
I believe that Fasttrack only use multi-segmented pararell downloads (or multi-source pararell d/l'ing) , I haven't seen any sign of real swarming in Fasttrack.
Correct me if I'm wrong.

I got confusion running around my brain