Packets get sent from your ps3/4 to their servers.
All counts as a lose unless you actually win, as there system to the game/your account wont register a win. When you lag/rage quit it sends the details as lost
in that logic then ddosing (lag, no packets sent / recieved, or pull the ethernet cable) before closing the game should work, but I kinda doubt it. host will probably signal the database that you've just quit / left (whether or not you're host anyway).