Yer' on my old team

, but let's see if I can help answer your questions!
It depends on the particular work unit (wu) and molecules you're working on. All wu's are ~ 10,000 molecules, some a little more, some a little less. Also, depending on the wu and the power of the machine you're crunching it on, it can take anywhere from minutes (my shortest was 13 min.), to weeks, to complete a wu. As for the number of hits, they can range from 0 - 700+, once again, depending on the wu. Patience and Persistence is what it takes according to Mondo.
There isn't any p2p network per say, . . . . . . . if you're set on auto pilot, your machine will want to upload/download when necessary from the [FAD] servers. If it can't upload/download when it needs to, it will create it's own wu's until it can.
In the mean time, welcome to Team TechIMO and [FAD]!
Harder