Thanks for the insights Squeakz, all makes a lot more sense.
I'd disagree on what you said about it being truly random, if its purely algorithmic, then ultimately its predictable, but really, that's not of interest/importance here.
I was thinking that it took an awful long time, from closing of the ballot to picking the winners, but I guess, they've got to at least wait for GFA (end of July?) and then its what 2/3 months till we find out, which I still thought was quite a wait. I'm putting that down to the logging you mentioned, I know in all my projects of any size logging and i/o are often large time sinks.
Shame about what you said about people not being able to guarantee themselves an entry. I was planning my 2013 entry to be the only rocket scientist on the Isles of Scilly with a sub 3:00 predicted finish time. Guess I'll have to actually get good at running and work on that GFA, which is about as likely as my aforementioned career and address change