User blog comment:Lancer1289/Are People in Multiplayer Lacking in Intelligence?/@comment-1679409-20120730195614/@comment-4310096-20120730200430

I can think of a reason: He was stuck in the loading screen for longer than you were. I sometimes have that too. When I play a match of FBWGG I notice for instance, that the team is already camped in the room on the other side of the map, even though I have just left the loading screen. I assume it has to do with my bad connection/obsolete PC. The thing is, that the players are in the loading screen and their characters are already present on the map and they're not invulnerable during that time.

Another possibility is, that he was "leeching" to your game, doing nothing and letting you do the work, while he earns your Credits/XP.

(If he just took longer that the rest of the team and then played like normal it was probably the former, if he didn't move the whole game, then he was leeching)