You posted the COMPUTE benchmarks, not the actual game benchmarks.
I posted the latest Civilization 5 game benchmark on Anandtech above.. The GTX 680 and 770 are both more GPU limited at those settings, than the GTX 780..
Who cares. Its yesterdays engine that took forewer to build and cost a fortune. Tomorrow its oxide SWARM. No lead thread. Using mantle. Its 300% difference on the application level. Rts just need a new api. Always had. Period. And i bet and hope nv is going to do the same for swarm too. As indicated by oxide themselves.