If this is what he meant, then "Quake or Unreal" must not include Quake Arena or Unreal Tournament, where "your AI buddies could very well have completed the level while your trying to find your way back". Heck, in UT2004 onslaught levels, you have to claim a vehicle if you don't want to be left back at base while your AI teammates take the first few nodes. (There usually aren't enough vehicles for the recommended players, maybe they expect some people to go out on foot.)
Personally, I've never understood why you'd want the game to tell you when to stop playing... I'm still playing classic UT, and Chuzzle's Zen mode.
If this is what he meant, then "Quake or Unreal" must not include Quake Arena or Unreal Tournament, where "your AI buddies could very well have completed the level while your trying to find your way back". Heck, in UT2004 onslaught levels, you have to claim a vehicle if you don't want to be left back at base while your AI teammates take the first few nodes. (There usually aren't enough vehicles for the recommended players, maybe they expect some people to go out on foot.)