This is how Quake Live works too - after a small download you enter a 10 minute warmup/skill-determining match against a bot, the rest of the maps carry on down

This is how Quake Live works too - after a small download you enter a 10 minute warmup/skill-determining match against a bot, the rest of the maps carry on downloading while you play. In my case everything had finished downloading by the time I got out of the warmup.