I attended last year and everything was ran well. I appreciated that the staff were adamant about start and end times. The only exception was the top table, which was given severe warnings after a particularly long game.
Scoring can be found at Wargamescon.com. Off the top of my head, I believe singles is 85% battle and 15% painting. Team is 50% battle, 20% painting, 15% sportsmanship, 10% presentation, 5% fluff.
I don't remember the prize distribution because I never win any at tournaments.