Yeah, that's fairly consistent with my experience. Unless one player completely (and I mean COMPLETELY) dominates the game, Cap & Control seems to always end in a draw. Seize Ground (at least with 3 or 5 objectives) and Annihilation have a sort of built-in tie-breaker anyways, so that might be why it's different in the game I play.
That, and I tend to get dominated, regardless of the game type.