I think they do.
In most of my games it's either one side dominates the map and any attempt by the n00b team to recapture flags would just = tele' rape or a simple walk to the flag to defend it since the popular maps are small enough. Then there are games where both sides are equally skilled and flags would just go dark, light, dark, light, dark , light and so on but there wouldn't be much of difference in war rank. I think flag locks need to be dropped to like 150 gold or some thinking needs to be done.